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Frequently Asked Questions

How to Choose a Wood-Fired Hot Tub

Why buy a wood-fired hot tub instead of an electric one?

  • It is cheaper to use a wood-fired heater than an electric one. We have calculated that heating the water once in 2021 will cost £6-13 with a wood-fired heater, and £12-24 with an electric one.
  • It heats much faster compared to an electric heater (1-2 hours in summer and 3-4 hours in winter compared to 12-24 hours, respectively).
  • It is eco-friendly, since wood is a renewable type of energy source. 
  • It’s aesthetic and providing you with an opportunity to keep a ritual with your preparation routine. Watching fire can slowly burn the tension and worries away.

Can I configure a Premium wood-fired hot tub myself?

Yes, you can select the different components and systems as you see it necessary to best meet your needs and desires.

What massage systems are used in Gardenvity Premium hot tubs?

The standard set of massage set in a Gardenvity Premium hot tub includes 12 air jets and 10 hydro jets. 

You can upgrade with extra 8 air jets and 10 hydro jets (20+20 in total) for maximum benefits.

Hydro jets are targeted streams of water that relieve tension in your back, while air jets provide soothing massage all over your body. With this number of jets, this wood-fired hot tub comes closest to a hydrotherapy electric spa.

What is the button layout to operate the Gardenvity Essential hot tub?

Only the hot tub with a SPA system, water filter, and LEDs will have these buttons.
There are three waterproof buttons on the side of the hot tub.

  1. The button on your left side is used to switch on the LED light, change the colours and switch it off.
  2. The middle button controls the air jets. If you add the hydro massage system (optional), you will have a separate button to switch it on/off and a dial underneath to control the intensity.
  3. The button on your right-hand side turns the water filter on and off.
Button layout without the hydro massage system.
Button layout with both the hydro massage and air-jet systems.

Does the massage system, water filter and LED lighting connect in the same line?

In our Essential models, they are connected in the same line and it goes with one plug.
In the Premium models each electrical appliance has it’s own cable and plug.

Is it possible to have an external heater?

An external heater is used only in Gardenvity Original Wooden models and in 1-2 seater Essential hot tubs.

When heating the wood-fired hot tub, how hot does the chimney get?

The chimney has a protection piece that does not get hot and is not dangerous to touch.

Which Fibreglass liner colour is better – white or grey?

Both are great colours. 

A creamy white liner creates more space visually and looks extremely pleasant at night. It allows the LED light effects to deliver their full potential. A white liner is considered to look more luxurious and smart. 

A creamy white liner will require more diligent cleaning since anything that lands in the water will be visible. If your hot tub is going to be surrounded by big trees, you should keep this in mind.

A grey liner is not as glaring in the daytime and keeps the lights down at night. Many customers say it looks more contemporary and blends with nature better.

If you’re curious, grey liners are more common among our UK clients, while more German buyers prefer the white ones.

When do I need a chimney extension?

Some of our clients want to place their hot tubs in a gazebo and lead the chimney through its roof. They will need a chimney extension for that.
The extension is also useful if your tub is placed in a secluded area (next to big trees, in the corner between buildings/walls) where air circulation is poor. An extension helps to ensure good chimney draught.
The chimney top should be at least three meters away from any flammable material, which is why sometimes it needs to be raised higher with an extension.
When installed, the standard chimney height reaches approx. 2.7 meters (106in) from the ground (measured at the cap top). A chimney extension will add 1 meter.

Where does the cable exit from under the tub?

The simple way to understand it is this – if you are facing the heater door, the equipment access door is on your left-hand side. The cable is hidden inside and there are two ways to take it out:

  1.  through the equipment access door (but it will keep your door open) or
  2.  from underneath the hot tub, which most of the clients prefer.

The cable is 2.5 meters long and if you need more than that, you simply need to connect the extension. We then advise keeping the plugs under the hot tub (inside the equipment compartment) and extend only the cord itself. It’s a safer way because the plugs will be protected from the elements.

What are the general aquatic safety rules when using a wood-fired hot tub?

Water recreation is both fun and therapeutic. However, it involves inherent risks of injury and death. To reduce your risk of injury, read and follow all product, package and package insert warnings and instructions.
For additional safeguards, also familiarize yourself with the following general guidelines as well as guidelines provided by nationally recognized Safety Organizations:

  •  Demand constant supervision. A competent adult should be appointed as a “lifeguard” or water watcher, especially when children are in and around the hot tub.
  • Learn to swim.
  •  Take the time to learn CPR and first aid.
  • Instruct anyone who is supervising hot tub users about potential hazards.
  •  Instruct all hot tub users, including children what they gave to do in case of an emergency.
  •  Always use common sense and good judgement when enjoying any water activity.
  •  Supervise, supervise, supervise.

Is the electric installation safe in a Gardenvity hot tub?

Yes. The current electric sockets used in Gardenvity hot tubs are equipped with an RCD (Residual current device) which protects both the electric devices integrated into the hot tub and yourself from any current leakages. The relay will switch off all the components should anything happen that might cause a risk to equipment or the user.

What metal the air jet nozzles are made from?

Air jet sprinklers are made of brass chrome.

What are the benefits of wood-fired heater?

Air jet sprinklers are made of brass chrome.

  • It’s cheaper to use a wood-fired heater than an electric one. Or it costs nothing at all, if you have a source of free firewood.
  • It heats much faster compared to an electric heater.
  • It’s eco-friendly, since wood is a renewable type of energy source.
  • It’s aesthetic and providing you with an opportunity to keep a ritual with your preparation routine. Watching fire can slowly burn the tension and worries away.

What accessories are available with a hot tub?

You will always see the accessories listed out with each hot tub model before buying.

You can choose the following:

Exterior shelf
Exterior shelf + Glass holder
Chimney extension
Hearth plate

What is the overall length of the cable?

2.5 metres.

What are the general safety rules when using a wood-fired hot tub?

  • Children must be supervised by adults at all times when using the hot tub. It is forbidden to jump and/or dive into the tub.
  • Children or objects cannot be seen under a hot tub cover. Entrapment is possible. Keep the cover locked when not in use.
  • Do not touch the metal parts of the heater (except the heater door and air valve handles) when it is in use.
  • The water in the hot tub should not be heated too much. The recommended water temperature is 37-39°C and below 37°C for people with heart and circulatory problems.
  • Take care on the stairs leading to the tub, especially in subzero temperatures, because the water turns into slippery ice quickly.
  • If there is ice on any surface when walking to or from your hot tub, be especially careful, and wear shoes or slippers with good tread.
  • When bathing in cold weather, use a cap to avoid catching a cold. Prepare a dry bathrobe or towel nearby within arms reach, and have a quick exit plan to reach your warm house.
  • People with contagious skin infections should not use the hot tub.
  • Do not use the hot tub if you feel unwell. Prolonged bathing or bathing in excessively hot water may cause dehydration or even a heat stroke.

Can I get the all-wooden Gardenvity Original hot tub with massage and water filtration systems?

No, there is no water filter or massage system in the Gardenvity Original hot tubs.

What liner colours are available with Gardenvity Premium hot tubs?

You may choose between 5 colours for your Gardenvity PREMIUM hot tub liner.
These are Pearlescent White, Grey Metallic, Gold Metallic, Blue Metallic.

What massage systems are used in Gardenvity Premium hot tubs?

The standard set of massage set in a Gardenvity Premium hot tub includes 12 air jets and 10 hydro jets.

You can upgrade with extra 8 air jets and 10 hydro jets (20+20 in total) for maximum benefits.

Hydro jets are targeted streams of water that relieve tension in your back, while air jets provide soothing massage all over your body. With this number of jets, this wood-fired hot tub comes closest to a hydrotherapy electric spa.

How much power does the UV light module consume?

It uses only 21W of energy.

What are the advantages of a sand/fibre ball filter?

Sand filters, which are the oldest water filtration system used in swimming pools, previously used natural filtering media – hence their name.
The technology has been significantly improved by replacing sand with more effective modern filtering media, such as fibre balls to trap smaller particles (down to 5-3 microns compared to 35-20 microns with sand).

The modern filtering media also plays an important role in reducing energy consumption, keeping the filter pumps under lower pressure. What is more, the fibre balls can be recycled to make it an environmentally friendly solution.

Do all Gardenvity wood-fired hot tub models come with a sand/fibre ball filter?

No, only the Premium line hot tubs.

What are the essential general precautions and recommendations when using a hot tub safely?

  1. You cannot leave children unattended.
  2. You must be careful if your health condition allows you to heat your body.
  3.  You shouldn’t use the hot tub after a heavy meal.
  4. You mustn’t bathe longer than 15-20 minutes, and the water temperature shouldn’t get more than 39°C.
  5. You must drink plenty of water to avoid dehydration.

Frost and chill will add a couple more precautions that are strongly advised to follow: 

– You have to keep your head covered to regulate your body temperature and keep your hair dry.
– You should be prepared to wrap yourself up in a bathrobe or a towel immediately when stepping out of the water.  
– You have to be careful when walking on the steps and making your way inside your house since it might be slippery.

How many people can fit in a Gardenvity hot tub?

Gardenvity offers a variety of sizes to welcome 1-2, 4-6, 6-8 or even 8-10 people. These depend on the model line and the size of the tub.

For example, an 8-10 seater is spacious enough for 8 adults and 2 children.

Do all Gardenvity wood-fired hot tub models come with a sand/fibre ball filter?

No, only the Premium line hot tubs.

What liner colours are available with Gardenvity hot tubs?

The Gardenvity Essential Fibrelglass hot tubs are available in two colours – Cream White and Dark Grey. 

You may choose between 4 colours for your Gardenvity Premium hot tub liner. 

These are Pearlescent White, Metallic Grey, Metallic Gold, Metallic Blue.

How many LEDs are there in Gardenvity wood-fired hot tubs?

There is one big and ten mini LEDs to create a romantic and playful glow in Gardenvity Premium hot tubs.

Our Essential line hot tubs are equipped with one big LED.

What is the button layout to operate the Gardenvity Premium hot tub?

There are 4 waterproof control buttons on the side of the hot tub:

  1. The button on your left side is used to switch on the LED light, change the colours and switch it off.
  2. The middle button controls the air jets.
  3. The third button is used to switch the hydro massage system on/off.
  4. The dial on your right-hand side controls the intensity of the hydro currents.
Your sand/fibre ball filter is enclosed in a Thermowood box and is controlled with the button on its side.

What is the difference between a hot tub with and without jets?

Air jets provide gentle body massage. The system will require mains connection, whereas models without a spa can be placed wherever you want even in the middle of the field, you will only need firewood and matches. And water, of course.

Does the bottom of our hot tub heater get hot?

The bottom of our hot tub heater does not get hot, so there is no danger of the decking boards being damaged. However, you would need to protect the area in front of the heater because when loading the stove with logs some sparks might escape.

We advise protecting the area in front of the heater door in a way that a wooden floor is protected in front of fireplaces. You may get a hearth plate as an accessory from us or use similar protection made of glass sheet, tiles and similar.

How thick is the fibreglass liner?

The fibreglass liner is 4-6 mm thick in most areas and 10mm in reinforced spots.

Can I buy accessories later?

Yes, of course! Bear in mind there will be a shipping fee, so we advise adding all accessories to your initial order.

Is there a 3 pin plug on the cable that comes with it?

Yes, it is included.

How many years should the Gardenvity hot tubs last if no chemicals or salts are used?

If you place and maintain your hot tub properly following our recommendations, it will last 8 years or more. The materials used in the hot tub (Thermowood, fibreglass, stainless steel) are robust and long-lasting.

Please consider the following most important things to ensure longevity:

– burn only firewood in the heater and always keep the necessary water level before ignition,

– you can only use chlorine and salts in the Premium models,

– do not break fibreglass with heavy objects,

– do not use abrasive cleaners,

– do not leave any water inside the tub in subzero temperatures,

– place the tub on a concrete base and make sure there is no vegetation too close to your hot tub; it might promote rotting of the wood.

How much water does the hot tub hold?

The hot tub model for 6-8 people holds around 1200-1300 litres (264-286gal) of water.

The model for 8-10 people has a capacity of around 1500-1600 litres (330-352gal).

The 1-2 seater needs twice less water to fill it up – 800 litres (176gal).

How does water circulate in the heater?

Basic physics apply: 

There are two holes inside the hot tub that operate as water inlet and outlet to and from the heater (below and above the LED light). Heated water flows upwards and through the upper hole (outlet) into the tub, while cold water stays nearer the bottom and keeps flowing into the heater through the lower hole (inlet). 

This cycle continues constantly while heating the stove. No mechanical pump is needed for this circulation.

Does the chimney come with a heat protector?

Yes, the chimney pipe is protected. 

The kids will not get burned if they accidentally touch the protection grate while bathing, it does not get hot.

Are your hot tubs insulated?

Usually, no insulation is needed as Gardenvity hot tubs with insulated covers maintain the heat very well. For example, suppose you heat the hot tub to 39°C in the evening and keep it overnight covered with an insulated faux leather cover when the outside temperature is around 15°C. In that case, the water will cool down by about 2 degrees, which means that almost no extra heating or just a short one is necessary. 
We can insulate the liner for an extra fee of £150 for use in colder climates, if necessary.

Should I choose a hot tub with or without a water filter?

The decision of getting a unit with or without a filter depends mainly on how often you plan to use your tub and how much effort you want to make while taking care of the water. When no water filter is used, you will need to drain the water after every 1-2 uses

over 1-2 days. We recommend this option if you are going to use the hot tub only on weekends, when you do not have a shortage of water supply, and do not mind changing the water often (we estimate that water price for a single fill-up will cost around £2.5–5).

When you operate the water filter for 4-5 hours per day and use the water treatment chemicals as instructed, our Essential models with allow you to keep the same water for 2-4 weeks. In the Premium models with sand/fibre ball filter and UV-C purification module, the water can be kept for up to a few months.

What power supply is required?

Voltage – 220V–240V, 50Hz/60Hz
Please check the specifications of your hot tub and calculate the total amperage needed:
Hydromassage: 10 jets – 1.1kW – 5.8amp;
20 jets – 2.2kW – 10amp
Air massage: 0.7kW – 3.3amp
Sand filtration system: 0,25kW – 1.6amp
Cartridge filtration system: 99W – 0.45amp
Electric heater: 3kW – 13.6amp
(For example, a hot tub with 20 hydro jets + air jet system and an electric heater needs a 28.5amp current)

How does water get circulated inside the tub?

The water inside the hot tub can be stirred manually with a paddle (included in the package) or by switching the air jets on.
It is necessary to stir the water while heating it to observe the temperature more accurately because water naturally gets into layers, with colder water sinking and warm water staying at the top. 

Can I configure a Premium wood-fired hot tub myself?

Yes, you can select the different components and systems as you see it necessary to best meet your needs and desires.

How many LEDs are there in a Gardenvity Premium hot tub?

There is one big and ten mini LEDs to create a romantic and playful glow in your hot tub.

What liner colours are available with Gardenvity Essential hot tubs?

They are available in two colours – Cream White and Dark Grey.

What value does the UV-C technology add in a hot tub?

It is an environmentally friendly and cost-effective technology. When used at a wood-fired hot tub, it reduces the amount of
chemicals needed for water sanitation while the disinfection effectiveness only increases.

Is the sand/fibre ball filtration system more expensive than a cartridge filter?

The sand/fibre ball filtration unit requires a higher initial investment. However, its maintenance becomes much cheaper in the long run.

Can I check the main product specifications in one place?

Size 1-2 people 6-8 people(6 adults + 2 children) 8-10 people(8 adults + 2 children)
Water capacity 800L176gal 1200-1300L264-286gal 1500-1600L330-352gal
Internal/external diameter 100 x 170/120 x 185 cm3’3” x 5’7” 180/200cm5’11”/6’7” 200/225cm6’6”/7’5”
Weight 200–210kg440–463lb 180–220kg Essential, 260 kg Premium397–573lb 220–260kg Essential, 290 kg Premium485–639lb
External height 95cm3’1” 95cm Essential, 100cm Premium3’1”, 3’3” 106cm, Essential, 100cm Premium3’5”, 3’3”
Chimney height 280cm9’2” 265cm8’8”
Chimney flue diameter 12.9 cm5”
Minimal base size 300 x 200cm9’10” x 6’6” 290 x 220cm Essential,330 x 330cm Premium
9’6” x 7’3” and 10’10” x 10’10”
320 x 250cm Essential, 350 x 350cm Premium

Water drain valve diameter 2.54cm 1”
Electricity supply Voltage – 220V–240V, 50Hz/60Hz​​Please check the specifications of your hot tub and calculate the total amperage needed: Hydro massage: 10 jets – 1.1kW – 5.8amp; 20 jets –  2.2kW – 10ampAir massage: 0.7kW – 3.3ampCartridge filtration system (Essential models): 99W – 0.45ampSand filtration system (Premium models): 0,25kW – 1.6ampElectric heater: 3kW – 13.6amp(For example, a hot tub with 20 hydro jets + air jet system and an electric heater needs a 28.5amp current)
Wood-burning heater Food grade stainless steel AISI 304 or AISI 316 Rated heating output  20–25kW
Recommended firewood & log size Kiln-dried hardwood or a mix of  hard and softwood. Log size – 30cm, chopped in halves & quarters
Standard steps size 60cm tall, 53cm wide, 74cm deep2’ tall, 1’9” wide, 2’5” deep
Curved steps size 65cm tall, 120cm wide and 75cm deep 2’1” tall, 3’11” wide and 2’5” deep

Payment and Warranty

What payment options do you accept?

We offer the fastest and most secure payment options available for you to pay for your hot tub.

There are 5 options to choose from!

  1.  Credit or Debit Card. Gardenvity has a secure credit card processing system provided by Stripe.

    We accept VISA, MasterCard, Maestro and American Express.
  2. PayPal checkout.
  3.  Google Pay option is available if previously set up on your Android device or Google Chrome internet browser.
  4.  Apple Pay can be used when set up on your Apple device (iPhone, Mac, etc.).
  5.  Bank transfer. Please contact us if that’s your preferred method of payment.

    Beneficiary: UAB FEROXI

    UK bank account number: 20000235
    Sort code: 04-00-75

    This account supports incoming domestic payments in GBP only.

Where do I get a coupon code for a discount?

You can get a coupon code upon subscribing to our newsletter. Please look in your spam folder to check if our email with the discount code has landed there by accident.
The coupon code can be easily applied at the checkout.

Can I spread the cost and pay instalments?

We don’t offer such option. In our e-shop, we accept an upfront payment in full amount.
However, we accept payments made from two different cards or bank accounts. This comes especially handy in case you have a spending limit or similar circumstances. Contact our Customer Experience Specialist for the above option.

Is VAT included in your prices?

Yes!

And if you are a UK VAT payer, you can claim the VAT paid when purchasing our product for use in your business.

Is it safe to order online?

Absolutely! We use Let’s Encrypt open certificate authority whose purpose is to make HTTPS ubiquitous on the internet through SSL/TLS certificates. These certificates are recognised by all modern browsers and use a high level of cryptographic technology to secure connections.
If you look at the address bar at the top of the browser during checkout, you will notice the ‘https://’ instead of the normal ‘http://’ at the beginning of the URL, which also indicates that you are in secure mode.

Is there a chance to freeze a special offer and pay later?

Please contact us individually to discuss the possibility to benefit from a current special offer if you want to make the purchase later.

Can a purchase be made by a business entity?

Yes! UK VAT will be charged on the orders delivered to the countries in the United Kingdom.
Gardenvity is a VAT payer in the UK, so you can claim back the VAT paid when purchasing our products for use in your business.
In the EU member states, Germany and France, a 0% VAT rate applies to Gardenvity products.
Prices listed on our website include the VAT.

What is your refund policy?

You can cancel your order by informing us in writing within two business days from the date of your order. A full refund would be issued within 14 days.

The buyer has the right to return unused and otherwise undamaged products by informing the seller about it no later than within 14 calendar days from the date of delivery.

– Shipping and transportation costs related to return shall be paid in advance by the buyer.

– The seller shall refund the monetary amount paid by the buyer within 30 days from the delivery of the returned product to the seller.Please read our full T&C here: Terms And Conditions |Gardenvity

How long is the warranty period?

We spent a long time trying and testing different materials and parts to ensure the highest quality. That is why all our hot tubs are backed by a 2-year warranty from the day of delivery.

Will I incur any additional charges (customs fee or other) due to Brexit?

Brexit has no impact on the price of our products.
There’s nothing to worry about.
The price you pay is the same as it was before Brexit and includes all local VAT.
There are no additional fees for orders.

How to apply my coupon code?

Having added the desired item to your Shopping cart, please enter the Coupon code in the grey field (see image below) manually (or copy and paste), and click on ‘Apply coupon’.
You should then see the updated price in your Cart totals!

Delivery Arrangements

What preparations do I need to make before the delivery with Placement & Assembly included?

Firstly, you have to contact us to double-check if you have sufficient access. We may ask for photos, videos, and measurements made on your site to check if a crane will be needed.

After that, the only thing you have to arrange is a free driveway and you being at home.

Can the hot tub be rolled on the ground to its final position after delivery?

No, we wouldn’t advise doing that. It is best to lift and carry it (keeping your back straight!) or use special equipment.

Do I need a crane?

If you don’t have sufficient access (you may check the required minimum space reading the How do I check if I have good access? question), most likely, you will need a crane. For example, if you need to get the tub over a fence, gate, or similar obstacle that cannot be moved.

Send us photos and measurements of your access path, and we will advise on what you need to do.

What are the dimensions of the delivery package that I could send to the crane operator?

The image below shows the package dimensions:

What delivery options does Gardenvity offer?

a) Standard (kerbside) delivery in most areas throughout the UK. The cost varies according to your location and is shown at the checkout.

b) Taking the hot tub to the final spot in your garden with our Placement & Assembly service will add extra £379 to your payment.

Can my wooden hot tub be delivered anywhere in the UK?

We provide shipping in most areas throughout the UK.

We do not ship to highlands and islands, but please contact us as we may be able to help you organize a delivery even in those remote areas of the UK.

When choosing a kerbside delivery, what arrangements do I need to take care of?

There are three main things to know and prepare for:

  1.  Ensure access for a delivery vehicle to your driveway.
  2. Arrange 3-4 helpful adults or a forklift to carry the hot tub to a designated spot.

 Arrange a crane if the passage is too narrow and you need to lift the hot tub over obstacles. Find more details about the above in our special article Kerbside delivery – are you ready?

Is the hot tub delivered on its side or flat?

It’s delivered on its side, pre-assembled.

How does a packaged hot tub look?

Each Gardenvity wooden hot tub gets carefully wrapped up with foam and protective plastic film.
Our hot tubs are packed sideways (vertically) on a EUR pallet.
Below are pictures of our hot tub packed and ready to ship.

How do I check if I have good access?

To bring your hot tub to its final location, there are minimal requirements in terms of space between walls, fences, etc. along the way. Please take measurements in advance.

If your passage is narrower or lower than required, you will probably need to hire a crane to get the tub over the buildings or other barriers.

Package dimensions (±3.9 inches (±10cm) on each dimension) – L x W x H

PremiumEssentialOriginal
6-8 people: 
205×120×220cm (6’8”×3’11”×7’3”)
1-2 people: 
210×110×210cm (6’11”×3’7”×6’11”)
4-6 people: 
170×130×180cm (5’7”×4’3”×5’11”)
8-10 people: 
225×120×237cm (7’4”×3’11”×7’9”)
6-8 people:
210×97x215cm (6’11”×3’2”×7’1”)
6-8 people: 
190×130×200cm (6’3”×4’3”×6’6”)

8-10 people:
234×110×240cm (×3’7”×7’10”)

Package type – EUR/EPAL-pallet, 120x80cm (3’11”× 2’7”)

What is the typical delivery time?

Our current delivery lead time is always kept up-to-date at the top of the page on our website Gardenvity.co.uk

Please contact us if you want to arrange a later date

How are the hot tubs delivered, are they manhandled off or using a lorry crane?

We deliver our hot tubs with a curtain-side van that has a tail lift. It is a 7x3m vehicle classified in the category of light goods vehicles. Read more on our website about the delivery process and view some pictures.

What if I don’t have sufficient access?

If you don’t have sufficient access (you may check the required minimum space reading the How do I check if I have good access? question), most likely, you will need a crane. We usually ask our clients to send pictures and measurements of their access path to determine if a crane is necessary.

If you choose the standard kerbside delivery, you’ll need to arrange a crane yourself. If you order Placement & Installation service (extra £379) with us, our team will find a crane for you (crane services are charged separately and payable upon the service provided).

What does the Placement & Assembly service include?

Placement & Assembly service means that a specialised team will get the hot tub to its final spot in your garden and make all necessary assembly work for you. It will cost £379. It will not cover the crane costs if it is necessary in your situation.

If you choose the Placement & Assembly service, you’ll be asked to provide us with additional details about your site, such as photos or videos, accurate measurements, etc. You will need to ensure good access to your site and remove any obstacles (gates, fence segments, etc.) that may block the way.
Read a full article with much more details about our Placement & Assembly service.

Location and base requirements

Does the base of the hot tub have to be perfectly flat?

Yes, you’ll need to make sure the wood-burning hot tub is placed on an even and stable surface.

If the base is not perfectly flat, you need to use some wood chips or other hard material under the hot tub. If you place the hot tub on the gravel, you have to raise it approximately 4cm to have good air circulation underneath.

What is the best base for a hot tub?

First of all, you don’t want one part of your hot tub to sink into the soil while the other will remain higher. That’s why you need a solid and even base. You also have to prepare the base, ensuring good air circulation under the hot tub and preventing vegetation growth. That is key when choosing the type of base.

Your base will need to ensure a good load-bearing capacity. When filled with water, the hot tub will weigh approximately 4,400lb (2,000kg) plus each hot tubber’s weight.

It is best to install your hot tub on a concrete base, concrete slabs, a wooden decker, or recycled PVC deck boards. Use leveling chips to create an even base, if necessary.

Read our dedicated blog post with tips and tricks related to the subject.

Do I need planning permission to install a hot tub?

Planning permission is not generally required for items that are relocatable/temporary, such as a hot tub. In the UK, the wood-burning heaters used in our hot tubs can be used in smoke control areas. However, we still recommend contacting local authorities before placing your order.

How to mount the external shelf?

  1.  Put the shelf on the desired side of the hot tub and align it as shown in picture 1
  2.  Screw on the legs with the 5x60mm screws (included).
  3.  Screw on the shelf top with the 5x70mm screws (included), as shown in picture 2. Do not drill through the top board joinings (if they are present).

With Gardenvity Premium models, the external shelf comes prepared for attaching it to the hot tub. Longer screws (5x100mm) have to be used in the upper holes of the shelf legs, and the shorter ones (4x70mm) – in the lower holes, accordingly, as shown in the image below:

Pro’s tip: Drive the screws halfway into the wooden legs before attaching them to the hot tub.

IMPORTANT! Before mounting the shelf, fit the cover first and fix the cover buckles. Then, find a free space to mount the shelf.

IMPORTANT! Two sizes – shorter and longer screws are included.

Do not mix them up! If longer screws are used to fit the legs of the shelf, they might damage the internal parts of the hot tub.

Watch our video with our team members in DYI action.

How to assemble standard steps?

You will need a Phillips screwdriver to drive the necessary screws.

  1. The set includes 2 pcs. assembled legs, 2 pcs. 60cm planks, 2 pcs. 50cm planks, 16 pcs. 5x70mm wood screws.
  2. Put the 50cm planks on the bottom holder. Then align the top and screw on one 60cm plank, as shown in pictures 1 and 2.
  3. Screw on both 50cm planks, as shown in picture 3.
  4. Screw on the second 60cm plank, as shown in picture 4.

Do I get a User Manual with installation instructions?

Yes, of course. You will receive a PDF file, as well as a hard copy Gardenvity Hot Tub User Guide with your hot tub.

Can I keep the hot tub under a roof?

Yes, it is possible, and it will add to better preserving your hot tub in the long run.

However, you must observe all safety requirements. When positioning a hot tub in a gazebo or similar structure, you will need a chimney extension. We recommend hiring a professional installer to do the job for you. Also, contact your local fire safety authorities for confirmation.

What should be the size of the base for a hot tub?

It depends on the size and model of your hot tub. See the image below to check the minimum base area for each Gardenvity hot tub model.

Please read this dedicated blog post with more tips on preparing the place for your hot tub.

How do I find the right place for the tub?

When selecting the place for your hot tub, ensure the following:

  •  An even and stable surface of the necessary load-bearing capacity (a hot tub filled with water will weigh approx. 4400lb (2000kg);
  •  A good distancing of the chimney from buildings and flammable materials;
  • Removing any flammable or explosive materials anywhere close to the heater;
  •  Access to water drain system if you cannot discharge the water on the lawn;
  •  A good access to the heater and for necessary maintenance operations;
  •  Protection against vegetation to minimise its effect that promotes rotting of the wooden parts of the hot tub;
  •  If the fire doesn’t burn well, this might be because your hot tub is located in a low spot. Adding a chimney extension flue might solve this problem.

How to fit the integrated heater door and ash grate?

The only tool you will need to do the job is a pair of pliers

  1. Remove the locking pin (J) from the hinge, then put the door (K) on the hinges and secure it with the locking pin.
  2.  Put the ash grate (H) into the heater.
  3. Slide drip tray (N) fully under the hot tub. It should be aligned with the water drain valve and entirely hidden under the tub.

Watch our video on YouTube, showing just how to do that.

How to assemble and connect the chimney?

Gear needed: a 7mm spanner and a pair of protective gloves.

  1. Remove the plastic protective film from all the metal parts. Wear gloves to protect yourself against sharp edges!
  2.  Connect the segments of the chimney flue according to the instruction diagram.
  3. Install the chimney cap on the chimney.
  4. Connect the chimney elbow to the tall segment of the assembled chimney, add it to the heater and tighten the clamp’s connection.*
  5. Mount the chimney bracket, fixing the ring (b and c) around the heat protector and securing the holder arms (a) to the wooden planks of the hot tub.

*The chimney in a Gardenvity Premium hot tub will have to be fixed by driving 4 screws (included) into the chimney elbow and through the inserted chimney flue to ensure sturdiness. No chimney bracket is needed in this structure.

Here is our video showing how to do that.

How to fit the water drain valve?

  1.  Prepare the valve by wrapping some plumbing tape (approx. 3 times) around the thread (a brass pipe located at the bottom of the hot tub next to the heater). The tape creates a tighter seal and prevents leakage. Make sure you rotate the sealant tape clockwise on the thread. Otherwise, it may come off when attaching the water drain valve.
  2.  Connect the water drain valve and tighten it with a spanner if needed.

    Watch our short video on YouTube, showing just how to do that.
  3.  Screw the garden hose connection fittings into the water drain valve in the clockwise direction.
  4.  Pull the hose on the connection with a hose barb and tighten it with a clamp (included).

Efficient heating

Why does smoke come through the heater door?

If you notice smoke coming out through the heater door, this might be caused by several reasons:

  1.  If the hot tub is placed in a corner, under a roof, near big trees, there might be a lack of air circulation, and the draught is too weak in the chimney flue. You may install an additional chimney extension pipe or consider relocating your hot tub.
  2. Check if the ash catcher mesh in the chimney cap has not become clogged. Remove the cap and brush it under running water. Put the chimney cap back.
  3. The smoke escaping through the heater door can also be a result of poor chimney maintenance. If you have not cleaned it following the instructions in the User Guide, please clean the chimney.
  4. If the smoke still does not come through the chimney top, there might be an air blockage in the chimney. To remove it, take the chimney cap off, prepare a paper clump. Light the paper and drop this burning clump into the chimney through the top. The fire will burn the oxygen and remove the air blockage.

How long does it take to heat the water to the desired temperature?

It is recommended to bathe in the water which is 37-39°C.

When attending to the fire correctly, an average water heating rate (for 439 gal/2000 litres) is approximately 8 degrees Celsius per hour. Thus, the water temperature reaches 38°C in 1-2 hours in summer and 3-4 hours in winter. This time is even shorter with the 1-2 seater hot tub, only 1–1.5 hours in the summer; 2–2.5 hours in the winter.

Naturally, it depends on the water temperature before heating, and the type of your firewood will also play a role in this case.

What firewood produces less smoke?

Very well-dried and barkless hardwood (such as oak, birch, maple and other) firewood will produce less smoke.

What is the best/fastest way to start a fire in the wood-burning heater?

Use some ready firelighters and a long reach lighter to start the fire.
Use softwood kindling for building up the fire.
Keep the heater air vents open.
Check if the smoke is going out through the chimney top.

Avoid burning paper as it will produce light ash that can get into the water.

How do I control the temperature of the water?

Every Gardenvity wooden hot tub comes with a floating thermometer. Use it to monitor the temperature when heating the water. Once you reach +39 °C, simply stop adding wood to the burner. If the water is too hot, add cold water with a garden hose and open the cover to let the excessive heat escape.

Stir the water with the paddle or switch on the massage system to move the water around.

Read more about effective heating of your hot tub

What fire safety tips must I know?

The wood-fired integrated heaters used in Gardenvity hot tubs are classified in the category of garden fireplace and barbecue. You should consult and follow all the requirements and recommendations from your local fire safety authority.

Stir the water with the paddle or switch on the massage system to move the water around.

What you must do:

  1. Keep a fire extinguisher nearby.
  2. Always act with caution to avoid any conditions or actions that may cause a fire.
  3. If the hot tub is near buildings, you are obliged to ensure that the chimney top is located at least three metres away from flammable materials.
  4. There should be no flammable materials located in front of or below the heater.
  5. Clean any soot from the chimney at least every two months.

What is prohibited to do

  1. Store fuel near the combustion chamber
  2. Use flammable liquids to light the fire
  3. Use coal, liquid fuel or gas.
  4. Burn the fire when the furnace door is technically unfit or cannot be closed properly.
  5. Use firewood that is longer than the combustion chamber.
  6. Use ventilation channels to remove smoke.
  7. Leave a fire unattended or with children.

Do I need to empty the ash drawer before starting the fire?

It is highly recommended to clean the ash drawer every time to make the fire burn easier.
You can still use the stove without cleaning the ash drawer for some time, but the heater efficiency will be decreased.

Hardwood or softwood – does it matter as long as it’s dried and seasoned?

A mix of soft and hardwood is the best. Softwood helps to build a fire more quickly, while hardwood hives more heat and burns longer.

You can use all kinds of wood for heating as long as it is dried, not painted or treated with chemicals. Only the performance will be different, meaning that you’ll need more time with some types of firewood. Also, using undried firewood is increasingly more restricted in the UK.

Please read our article and get a better idea of how to heat the tub efficiently.

Do wood-burning hot tubs bubble?

A wood-burning hot tub with an installed whirlpool SPA runs with electricity and the water bubbles. The air jets circulate the water, making the air bubbles rise from the bottom up.

How long does it take to heat a 1-2 seater Gardenvity hot tub?

The wood-fired stove heats the water very quickly, requiring only 1–1.5 hours in summer; 2–2.5 hours in winter.

How do I heat the wood-fired hot tub quickly and safely?

Please read our detailed step-by-step guide with photos and videos on how to heat your hot tub effectively and safely. 
We do want to repeatedly remind you of the critical things you must bear in mind for your safety when using a product that operates with fire

WARNING: You must not start heating the hot tub if it’s not filled with water. You may burn the unit down

CAUTION: Before igniting the heater, remove the plastic protective film from all the metal parts

CAUTION: Never leave the heater unattended. Never leave burning logs overnight.

CAUTION: Do not burn coal or other kinds of fuel in the heater. Burning coal can overheat the heater and damage the hot tub.

NOTE: Underneath the hot tub, near the drain valve, there is a small hole for the occasional condensation to escape.

When you start using the heater, a small amount of brownish fluid might come out. Don’t worry, this is normal, and it’s not a leak.
Gradually, less and less condensation will build up. To protect the base, a drip tray is provided.
TIP: The water heats faster when the hot tub is covered. Monitor the water temperature with the water thermometer (included).
Here are the steps you need to take to heat the hot tub as quickly and safely as possible:

STEP 1. Plan in advance. The water temperature rises by approximately 8 degrees Celsius per hour. It may also take about an hour to fill the hot tub with water, so you have to bear that in mind.

STEP 2. Prepare some kindling, chop firewood finely and then have your larger logs ready.

STEP 3. When the water reaches the required level, start with tinder and kindling. Use softwood to build up the fire.

STEP 4. Heat the water by burning medium-sized firewood. If you pile large firewood as soon as you have the fire going, it will take longer to heat the water in your hot tub.

STEP 5. Once you have the water heated to the recommended 37-39°C, maintain the heat by placing some large firewood in the heater. If the water gets too hot, take off the cover of your hot tub for ventilation, you can even add some cold water to make the temperature more comfortable for you.

Can the water be heated with the electric heater in a Gardenvity Premium hot tub?

Yes, although its primary function is to maintain the temperature of the water once it gets heated with the wood-fired stove. Depending on the weather conditions and the starting temperature of the water, the 3kW electric heater will heat the water to the bathing temperature (39℃) in 22-26 hours. Please note that you must keep the water filter on to pump the water through the heater all the while.

What are general fire safety rules for using a wood-fired hot tub?

We are a manufacturer of hot tubs and heaters and offer general fire safety guidance. However, you should always consult and follow the fire safety recommendations of your local fire authority.
Integrated hot tub heaters are assigned to the garden fireplace and barbecue class.
In case the hot tub is placed near buildings, the user is obliged to ensure that the chimney top is located away from flammable materials. The chimney top should be at least three meters away from any flammable material. A smaller distance is sufficient for the pipe of the chimney. There should be no flammable materials located in front of or below the heater. Please act with caution to avoid any conditions or actions that may cause a fire.

It is necessary to clean out soot from the chimney at least every two months. While using the hot tub heater, it is prohibited to

  • Store fuel near the combustion chamber
  • Use flammable liquids to light it
  • Use coal, liquid fuel or gas
  • Burn the fire when the furnace door is technically unfit or cannot be closed properly
  • Use firewood that is longer than the combustion chamber
  • Use ventilation channels to remove smoke
  • Leave unattended or let young children look after the fire

What happens if I start the fire without filling the hot tub with water?

It is extremely dangerous! You must not ignite the heater when the hot tub is empty. You would most likely burn the hot tub this way.
Strike a match only when the water level reaches 4-8 inches (10-20cm) below the top rim.

Why does heating to reach the right temperature take so long if the chimney draught is OK?

There might be a couple of reasons

  • First of all, we suspect that the unusually long heating time is caused by the firewood which is not perfectly dry. It’s best to use kiln-dried hardwood firewood for heating the water in a Gardenvity hot tub after you have the fire started with a mix of softwood.
  • The type of firewood can also play an important role. The heating values of ash and sycamore wood are among the lowest compared to other types of hardwood firewood (check the values here). Try heating the hot tub with a different kind of firewood that has higher heat values (e.g. birch) and compare.
  • Use split logs (in quarters or even finer) and add them to the fire regularly in small amounts. Keep the combustion chamber 3/4 loaded and not full to ensure a more even combustion.
  • Always keep the insulated faux leather cover on the hot tub while heating the water. It makes a huge impact on the heating time!

Read our article with steps on heating a Gardenvity wood-fired hot tub most efficiently.

What is the recommended length of firewood to use in the hot tub?

We recommend 25-30cm long logs, split into halves and quarters.

Firewood logs must not be longer than 25-30cm (10–11in); otherwise, they will not allow closing the heater door properly. If you use longer logs and the fire burns right at the heater door, or if strength is used when closing the heater door (and the wood is touching the glass), the glass might crack. This type of crack is excluded from our warranty.

How much firewood do I need to heat the water once?

On average, you will need 12-25kg of dry firewood to heat the water to the bathing temperature. It will, of course, take less logs (12-17kg) to heat the water in the 1-2 seater hot tub.The amounts will vary depending on the season of the year and the water temperature before heating.

What is the ideal water temperature?

No matter what time of the year it is, we advise keeping the water in the wood-burning hot tub at +39 °C as heating the water any higher can cause you to overheat, dehydrate and experience headaches. Those who have heart issues should avoid bathing in high temperatures.

Is there a maximum time I can spend bathing in a wood-fired hot tub?

Keep it short – 15-20 minutes a session and stay properly hydrated so you don’t overheat. After a session, wait until you’re properly cooled down and only then go for another round, which should be a bit shorter than the first.

Preserving water

How do I drain water properly?

Two important things:

  1.  Drain the water only after the fire/embers in the heater are completely extinguished. If you need to quicken the process, you can sprinkle water on the fire/embers to put them out.
  2. When the hot tub is emptied, keep the drain valve open for occasional condensation to drain properly.

Drain the water through the valve at the bottom of the hot tub next to the heater door.

We recommended draining the used water into the household drain. Connect the water hose to the valve, put the hose into the drain, and turn the valve handle to open.

If the chemicals you use for water sanitation allow, the water can be also drained into a septic tank or onto plants.

How can I control the amount of limescale in my hot tub?

First of all, you have to check the pH level in the water daily.There are special inhibitors that will help you remove and control limescale in the hot tub. You may use this link or look for similar products.

What chlorine-free products can you recommend for water sanitation?

We have received positive feedback from clients who used Aquablanc products (O2 tablets + Combination Liquid). Go here and here to select their products.  
Pay attention to the manufacturer’s instructions when using the products.

How long does it take to drain all the water from the hot tub?

It should take around 1.5 hours – just like filling up. We highly recommend using a 3/4in garden hose to shorten the process significantly.
The water from the 1-2 seater hot tub will run out twice as fast.

What do I have to know about filling the hot tub with water?

Before filling the hot tub, it is advised to clean it with a soft cloth and gentle detergent. Rinse well using a water hose and empty all the soapy water. 
Put the water hose into the tub over the top rim.
It takes approximately 1-1.5 hours to fill the tub, depending on the diameter of the water hose (a usual garden water hose is 1/2 inches wide; when replaced by a hose with a diameter of 3/4 inches, the tub filling time will be significantly shorter).

The1-2 seater hot tub will take twice less time (30-45min) to get filled with water.

Keep pouring the water until the water level reaches 4-8 inches (10-20cm) below the top rim.

Can I use aromatherapy bath salts in the hot tub?

It is possible to use such products, but then we advise you to drain the water after use and not
keep it in the hot tub for an extended period.
You will have to check if your chosen sanitising chemicals mix well with salt.

How often shall I change the water in the hot tub without a water filter?

You will have to change the water in 1-2 days after bathing.

Do I need to connect the hot tub to the household drain system?

Not necessarily. It depends on where you position your hot tub and how you prefer to drain the water.

If you don’t use any chemicals, you may use the water from the hot tub for watering your garden. Be careful not to flood your lawn, though.

How much water is needed in the 1-2 seater Gardenvity wood-fired hot tub?

800 litres.

How long do I have to operate the water filter with a 1-2 seater Gardenvity hot tub?

2-3 hours per day.

Can I stop using water sanitiser chemicals when there’s a UV-C purification system installed in the hot tub?

No. Although the UV lamp does reduce algae and bacterial populations, it must be used to augment traditional water sanitising measures (chlorine, bromine or oxygen-based water treatment systems) and cannot be used alone.


You will be able to substantially decrease the amounts of chemicals used.

How long do I need to operate the UV-C system?

The UV-C module operates when the water filter is on. It is recommended to run the filtration system 4-5 hours per day.

How does UV-C work to disinfect water?

Ultraviolet (UV) light, just outside the light spectrum visible to our eyes, is electromagnetic radiation of 200-280 nm wavelength. This wavelength is the most lethal for microorganisms, viruses and bacteria. UV-C radiation used in our filtration system causes permanent damage to microorganisms present in the hot tub water by penetrating through their cell walls and disrupting their DNA. Thus, the microorganism reproduction capacity is damaged, or it is killed. The microorganisms must be directly exposed long enough to the UV-C radiation of the correct intensity to ensure effective disinfection.

Do I need to use sand in the sand/fibre ball filter in a Gardenvity wood-fired hot tub?

No.

The model of the filter unit that we use in Gardenvity hot tubs has a pump that is designed to operate with fibre balls and not sand to filter the water. It has less power and thus is more energy-efficient, but this power will not be sufficient to filter the water through sand.Please use fibre balls in this sand filter (‘sand’ is used here only to denote the type of filter unit, not the filtration media).

How often will I need to change fibre balls in a sand/fibre ball filter?

2 years on average.

Do fibre balls perform well at cleaning the water in a hot tub?

They perform extremely well filtering the particles down to 5-3 microns in size.

How often do I need to wash the fibre balls?

Every 3 months on average.

What maintenance works need to be carried out with a sand/fibre ball filter?

As a standard, maintenance works with a sand/fibre ball filter includes the following:

– Timely cleaning of fibre balls. Typically, you’d expect to see the pressure gauge needle going up, signalling you to backwash, but not with the fibre balls. We recommend that you inspect the fibre balls inside your filter every 3 months and clean them if needed. However, it will largely depend on usage and quality of the water.  Use a little trial and error to find the best schedule for your hot tub. When you keep fibre balls clean, you’ll have better filtration, water flow and clearer water. 
– Cleaning the filter strainer (positioned inside the hot tub at the foot well) to remove the larger debris restrained at the water pump inlet when you see it.
– Changing fibre balls when they lose effectiveness. This has to be performed only once in 2 years.

Can I save water when using the sand/fibre ball filter?

Yes, you can keep the water unchanged for a few months when using with UV-C lamp.

How often shall I change the water in a hot tub with a water filter?

It is possible to keep the same water in the hot tub for 2-4 weeks when using a cartridge water filter + chlorine-free chemicals.

If you want to keep water for longer periods, you will need to run the water filter for 4-5 hours every day and administer water treatment products following the instructions in the product manual.

You can only use chlorine-free chemicals in the Gardenvity wood-fired hot tubs with fibreglass insert. We have received positive feedback from our clients who used Aquablanc products for chlorine-free water sanitation.

You can be flexible when choosing the water sanitisers to use in your Gardenvity PREMIUM wood-fired hot tub, since its component materials are chlorine-compatible.

Please check the water filter cartridge every week. Usually, you will be able to wash away the dirt on it and use the same cartridge, but when the dirt does not come off easily, replace the cartridge (the manufacturer’s recommendation is to replace it every 2-3 weeks).

The fibre balls used in the sandfilter (in Gardenvity Premium models) have to be checked at least every 3 months and replaced every 2 years.

To monitor the quality of the water, you will have to observe it visually and check the pH levels (keep the water pH in the range of 7.0 -7.6). pH test strips might not be very accurate, so we recommend getting an electronic pH measurement device.

Is it easy to drain the water out?

Yes. Every wood-fired hot tub has a standard, external water drain valve at the bottom of the hot tub next to the heater. Read more in the How do I drain the water properly? question.

Is the water pumped out from the hot tub when draining?

There is no pump installed in our hot tubs for draining the water. The water drain valve is at the bottom of the tub, therefore water flows out naturally.

This also means that we do not recommend diverting the water uphill (higher than the bottom of the hot tub) since it will not run out entirely.

Do wood-fired hot tubs need chemicals?

If you drain your private hot tub after 1-2 uses, there is no need for chemicals. This is great for those who want to enjoy a relaxing and chemical-free bathing experience.
With a water filter and chlorine-free sanitisers, you can keep the same water in your hot tub for about a month on average.
If your hot tub is used by guests in your holiday cottage, you must replace the water after each use.

Our Premium models with sand/fibre ball filter and UV-C module use advanced water purification technology and makes it possible to keep the water unchanged for a few months. Holiday let owners can also change the water less frequently.

You can be flexible when choosing the water sanitisers to use in your Gardenvity PREMIUM wood-fired hot tub, since its component materials are chlorine-compatible.Read our special article on water hygiene.

Why can’t I use chlorine products for water treatment in Gardenvity Essential Fibreglass hot tubs?

There has been evidence that excessive amounts of chlorine will increase the risk to your health.

Over time, chlorine can damage the parts of the hot tub, causing corrosion and discolouration.

The Gardenvity PREMIUM wood-fired hot tub component materials are chlorine-compatible. Therefore, the Premium models can be used with chlorine chemicals.

What filtration systems are used in Gardenvity hot tubs?

The Gardenvity Premium wood-fired hot tubs use an advanced water filtration technology with a sand/fibre ball filter and a UV-C module.

The lightweight and environmentally friendly fibre balls serve for 2 years and can be recycled. Please wash the fibre balls at least once in 3 months.

The UV-C lamp kills or sterilises pathogens present in the water. As a result, you’ll be able to reduce the amount of chemicals needed by 50-80%.

The Gardenvity Essential wood-fired hot tubs use the INTEX Krystal Clear  Model 638R filter. It needs type A cartridges that are widely available to buy online. The filter cartridge can be cleaned with running water after a week of using it (observe how dirty it is), and then replaced after one or two weeks.

It pumps 3,758 litres of water per hour and needs to be run at least 4-5 hours a day.

Can I start draining the water when the embers are still hot?

Absolutely not!

The fire/embers in the heater must be completely burned before draining the water; otherwise, you may severely damage your hot tub or cause a fire.
If you want to quicken the process, you may put out the fire/embers with water and only then open the water drain valve.

Should the water be drained after each use during wintertime?

Yes, you should drain the water after each use in colder seasons when the temperature is below zero. Letting the water freeze can damage your wooden hot tub.
If you keep the water at bathing temperature (around 39℃) for a longer time, then you don’t need to drain it.

Can I use chlorine chemicals for water disinfection in the all-wooden Gardenvity Original hot tub?

Absolutely not. Chlorine will damage the wooden parts of your hot tub.

How does UV light affect water properties?

It has no effect on the pH, conductivity or chemical properties of the water in the hot tub.

As an added benefit, the UV-C technology will reduce the smell of chlorine (if used for water sanitation).

Does UV-C module kill pathogens and algae present in the water?

UV light sterilises pathogens rendering them unable to multiply and causing hygiene and health risks.

Where is the UV-C module placed in the Gardenvity wood-fired hot tub?

The compact UV-C module is installed at the sand/fibre ball filter that is placed in a Thermowood box.

Is the UV-C technology efficient in a hot water environment?

Yes. The Blue Lagoon UV-C unit used in Gardenvity wood-fired hot tubs is specially designed for water with high temperatures (±40°C), such as spas and hot tubs.

How often do I need to replace the UV lamp?

Every 9,000 hours (5 years when used 5 hours a day).

How to replace fibre balls in the sand/fibre ball filter?

It is a straightforward procedure. Here’s what you need to do:

  • Switch the filter unit off;
  • Remove the multiport valve;
  • Take the fibre balls out by hand;
  • Rinse the filter tank well;
  • Put the new (or washed) fibre balls into the filter tank up to the mark;
  • Fill the tank with water;
  • Mount back the multiport valve and run the filter again.

How to clean the fibre balls?

After around 3 months of usage, fibre balls have to be taken out to soak and wash manually or in a washing machine (please, put them in a washing net when doing so!).

Are fibre balls recyclable?

Yes, the fibre balls can be recycled to make it an environmentally friendly solution.

Can I stop using water sanitisers when a sand/fibre ball filter is installed in my hot tub?

No. The sand/fibre ball filter removes debris and particles, and you still need water treatment chemicals to kill the bacteria.

Where can I buy fibre balls?

You can buy fibre balls to use in with Gardenvity hot tubs on Amazon.

Do I need to perform the backwash operation when the sand filter is filled with fibre balls?

No. You need to wash the balls by hand or in a washing machine.

Maintenance

How much does it cost monthly to run the water filter?

We advise running the water filter for 4-5 hours every day to keep the water clear. Considering the average energy rates in the UK, the realistic figure for running the cartridge filter in your hot tub is around £3 a month. The more powerful sand/fibre ball filter will cost around £7 monthly for the power consumption.
Changing cartridges 1-2 times every month will cost £4-8, while the fibre balls in Gardenvity Premium products need replacement only once in 2 years, and it costs £17 to buy a replacement.

Remember: You must not run the filter when the hot tub is occupied.

How do I know which holes in the liner belong to the heater and the water filter?

There are two pairs of holes (inlet/outlet) in the hot tub liner. Where the convex bench rises (to create space for the integrated heater underneath), there are two holes for water circulation into/from the heater. Never block them.

The other pair of holes belong to the water filter. There are plugs provided for the filter holes. Use them when servicing the water filter.

Do not run the filter when the tub is occupied.

Do I have to empty the tub every time when cleaning or replacing the filter cartridge or fibre balls?

No, you don’t have to drain the water to complete this task. When you want to clean and replace the water filter cartridge when the tub is full with water, switch the filter off and block the filter inlet/outlet holes with the provided plugs. When you complete the work, take the plugs out, release the air from the filter, and continue using it as usual.
With the sand/fibre ball filter, you simply have to switch off the filter unit and take the fibre balls out following the instructions.

What tools do I need to use to clean the chimney and the combustion chamber?

You can clean the chimney with a typical chimney brush and a rod. See an example here. We recommend cleaning the chimney after 15-20 times.

When cleaning the heater combustion chamber, you can use a set of tools shown below or similar. Take the ash away from the ash drawer and clean the combustion chamber after each use for best heating results.

Tools for cleaning the combustion chamber.

How often should I clean the hot tub insert?

Please clean the insert of your hot tub every time you drain the water.
We highly recommend doing so while the hot tub is still wet inside, and it will require only gentle cleaning movement with a soft cloth/sponge and the right cleaner. Do not allow any sediments to dry out because it will be much more difficult to clean them.

What should I know about the maintenance and care of the insulated faux leather cover?

IMPORTANT! When the hot tub is not in use and is empty, condensation can still collect under the cover. Always leave the water drain valve open for the condensation to escape.

  • Always unfasten all straps before opening the cover. Gently fold down the cover onto itself.
  • Do not sit, walk, or lie on the hot tub cover. Avoid placing any heavy objects on the cover.
  • Keep the cover clean, free of dirt and debris. Remove leaves or other debris to avoid discolouration.
  • Use a mild detergent and water solution to clean the faux leather/vinyl monthly.
  • Maintain the proper hot tub water chemistry. Any texture change or extreme discolouration of the bottom material indicates chemical burn.
  • Avoid snow from accumulating on top of the cover.
  • Avoid scraping the cover on rough surfaces.
  • Avoid jerking or pulling the cover, especially when vinyl is soft from heat, to prevent tearing the vinyl.

What is the colour code of the gel coat in the fibreglass liner repairs kit?

The colour codes of the gel coat in the fibreglass liner repairs kit for small and deep scratches are the following:
Grey – RAL7015
Creamy white – RAL9001

Can you recommend a cartridge for the water filter?

You need a type A filter cartridge. One of the options to buy it online is here.

What safety instructions must I know when using the water filter?

These are essential safety instructions when using the water filter, which is an electric component and has its risks.

  • Do not operate this product when the pool is occupied. Keep it switched off while bathing.
  • Do not attempt to plug in or unplug the water filter while standing in water or when your hands are wet.
  • Always unplug the water filter from the electrical outlet before removing, cleaning, servicing or making any adjustment to it.
  • Children must stay away from the water filter and electrical cord(s).
  • Children should be supervised to ensure that they do not play with the water filter.
  • The water filter is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge. They must at all times be supervised by a knowledgeable and experienced adult responsible for their safety.
  • Assembly and disassembly shall be carried out by adults only.
  • Risk of electric shock. Connect the water filter only to a grounding-type receptacle protected by a ground-fault circuit interrupter (GFCI) or residual current device (RCD). Contact a qualified electrician if you cannot
    verify that the receptacle is protected by a GFCI/RCD. Use a qualified electrician to install the GFCI/RCD, which has a maximum rate of 30mA.
  • The plug must be accessible after the water filter is installed.
  • Locate the cord where it will not be damaged by lawnmowers, hedge trimmers and other equipment.

FAILURE TO FOLLOW THESE WARNINGS MAY RESULT IN PROPERTY DAMAGE, ELECTRIC SHOCK, ENTANGLEMENT OR OTHER SERIOUS INJURY OR DEATH.

Will the water filter switch off automatically?

The water filter needs to be turned on and off manually.
You may take great advantage of using a timer plug socket and then program it for the nighttime to run the filter while you sleep. Simple timer plug sockets are available widely on Amazon and other retailers.

How often do I need to clean the heater and the chimney?

Our standard recommendation is to clean the chimney after 15-20 uses. Remember to clean the chimney cap with a mesh at the same time!

How regularly you need to clean the heater and the chimney will depend on the type of firewood you use. Soft resinous wood produces more soot and, therefore, needs to be cleaned more often.

Should I stain the inside of the wooden Gardenvity Original hot tub?

No. It’s enough to stain the external part of the Thermowood cladding.

Can I find the essential tips in one place for using a hot tub?

Here are the main 18 points laid out in the most minimalistic way. You may also read an article presenting the “nutshell” of using a Gardenvity hot tub.

  1. The hot tub must be filled with water before the heater is ignited. The inlet and outlet of the integrated heater should both be under the water (very important!). Fill the water until it reaches about 10-20cm below the top rim.
  2.  When using the heater, the ash grate must always be inside.
  3. Use dry wood for heating. Never use coal instead of wood because the heat generated may damage the heater or even the hot tub itself.
  4.  Don’t use any flammable liquids for ignition.
  5.  Always be careful – the heater and the unprotected area of the chimney can become very hot and can cause severe burns.
  6.  To control the combustion, open or close the heater vent.
  7.  The water will heat up faster if the hot tub is covered.
  8.  You can drain water from the hot tub only when the fire is completely out, and the heater is completely cool (very important!).
  9. Never use sharp cleaning tools because you will damage the surface of the hot tub.
  10. You can use chlorine-free pool/bath cleaning products to clean the hot tub. Cleaning products with chlorine can only be used at cleaning the acrylic liner in our Premium hot tubs.
  11.  Excessive bromine, chlorine, or shock can deteriorate hot tub cover.
  12. During freezing temperatures, no water should be left inside the hot tub, filter or heater.
  13. To preserve the brown Thermowood colour, the exterior wood of the hot tub should be treated once a year.
  14.  The massage jets and filter cannot be turned on before the hot tub is filled with water.
  15. Do not forget to turn off all systems (including the LEDs) after finishing bathing.
  16. Stay off the cover, it will not support any weight.
  17.  Do not operate the water filter when a hot tub is occupied. Keep it off while bathing.
  18.  When the hot tub is emptied, keep the water drain valve open for any occasional condensation to drain properly.

What is the heater panel of Gardenvity Premium hot tubs made of?

It is made of stainless steel and covered with special heat-resistant paint.

What are the maintenance works required with a Gardenvity Premium hot tub?

  • Cleaning the combustion chamber and emptying the ash drawer – the more often, the better.
  • Inspecting the sand filter strainer and cleaning it at least once a week.
  • Wiping the acrylic liner after each water draining.
  • Washing the fibre balls in the filter at least once in 3 months.
  • Cleaning the chimney and the heater every 15-20 uses.
  • Staining the Thermowood parts once a year if you want to preserve the original colour (optional).
  • Replacing the fibre balls every 2 years.
  • Changing the UV lamp every 9,000 hours of operation (once in approx. 5 years when used for 5 hours daily).

How to clean and replace the water filter cartridge?

It is recommended to replace the filter cartridge every 2-3 weeks. If the dirt can be washed easily, you may continue using the same cartridge. We’ve received feedback from our clients who clean the cartridge after each use and extend the service life of the cartridge for much longer.

1. Make sure the filter pump is not operating. Disconnect the power cord.
2. To prevent water from escaping the hot tub insert the plugs into inlet and outlet holes.

3. In a counter-clockwise motion, remove threaded cover (3) and cover seal (4). Be careful not to lose the cover seal.
4. Remove filter cartridge (5) to clean it. Inspect the cartridge and clean it with a good spray from a water hose.
5. Use judgment as to whether the cartridge needs to be replaced. Check it at least once a week. If the dirt comes off easily, you can continue using the same filter cartridge.
6. Return the cartridge to the filter.
7. Return the seal (4) and threaded cover (3) to their original positions. Tighten the threaded cover (3) by hand only, twisting it in a clockwise direction.
8. After service, open the air release valve, remove the plugs, allow any air to escape through the valve before tightening the valve again. The pump is now primed with water again and may be turned on.

How often shall I switch on the water filter?

You will need to run the water filter for 4-5 hours every day and administer the water treatment products following the manufacturer’s instructions, if you want to keep the water in for longer periods of time.

How to clean the hot tub liner?

Please use pool cleaning products to clean the insert of the hot tub when it’s still wet after draining the water. We recommend using a soft cleaning cloth/sponge as it will not scratch the surface. After cleaning the tub with detergents, rinse well with a water hose and drain completely.

Cleaning products with chlorine can only be used at cleaning the acrylic liner in our Premium hot tubs. Do not use them with our Essential or Original models so that chlorine does not damage the hot tub parts.

If you use aromatherapy bath salts or essential oils in your hot tub, when the tub is emptied, make sure you properly clean and rinse the residues from the insert.

Is it difficult to clean the acrylic insert of a hot tub?

Not at all. Cleaning the acrylic liner is super easy, requiring no more than a wipe down with a soft cloth or a sponge while it’s still wet. Due to the materials and technology used in the production process, the surface of an acrylic liner is exceptionally smooth.

How to clean the wood-fired heater?

To clean the heater walls, you have to spray water through the water inlet and outlet holes in the hot tub liner. Repeat until there appears to be no more dirt in the water heating part.

How to prepare the hot tub for winter?

You will probably be using your hot tub all year round. Below are the instructions that will help you prevent any unplanned expenses and to save you the trouble of any damage that freezing water can do to a hot tub.

  1.  Frozen water expands, and it may damage the pipework or vessels. There are multiple holes in the hot tub insert to drive the air or hydro currents in. You can’t leave any water remaining in there. When embers in the wood-fired heater are completely cooled down, drain the water entirely. Make sure you don’t drain the water when the heater is still hot!
  2. When the water is flushed completely, turn on your massage system for up to 30 seconds to blow air from all the tiny holes.  
  3.  Tidy your hot tub up! When you flush the water, it’s much easier to clean the walls of the liner as opposed to cleaning the hot tub when it gets dry.
  4. Make sure you leave the water drain valve open.
  5.  Secure the cover.
  6.  If you expect strong winds, remove the top flue of the chimney.

Bonus tip: Gardenvity recommends preparing a few cloth bags with bicarbonate of soda. It’s a great deodoriser, and it absorbs humidity, so your hot tub will remain smell-free and dry all the time. You’ll remove those bags in a matter of seconds the next time you’ll use your hot tub.

Are wooden hot tubs difficult to clean?

A wood-fired hot tub liner is easy to clean when it is still wet after draining the water. We recommend using regular hot tub/pool cleaning agents.
Cleaning products with chlorine can only be used at cleaning the acrylic liner in our Premium hot tubs. Do not use them with our Essential or Original models so that chlorine does not damage the hot tub parts.
Please, do not use abrasive cleaners or scrapers that may damage the surface of the insert.
To clean the liner of your hot tub, please use a soft cleaning cloth or a sponge not to scratch the surface, rinse well with water and drain thoroughly.
If you use aromatherapy bath salts or essential oils in your hot tub, when the tub is emptied, make sure you properly clean and rinse the residues from the insert surface.
To clean the heater walls, you have to spray water through the water inlet and outlet holes in the hot tub liner. Repeat until there appears to be no more dirt in the water heating part

Please clean the liner of your hot tub every time you drain the water. The heater has to be cleaned after every 15-20 uses.

Can I use the spare room under the hot tub for storage?

No. We must discourage you from using the spare room under the hot tub for storage for the following reasons:

  1. All the electric devices used in the Gardenvity hot tub require a proper ventilation for cooling – especially the compressor of the massage system. It needs enough air circulation around. Thus, no objects should be placed nearby that could affect adequate ventilation.
  2. When storing firewood logs, there is a risk of damaging the insert walls, air hoses and other devices or parts installed under the wooden cladding.
  3.  If stored unstably, firewood logs may fall and damage some hot tub parts or the integrated devices. We should let you know that the damages incurred could not be subject to our warranty in such a case.

What is the diameter of the water drain valve, and what size garden hose do I need?

The water drain valve is 1 inch in diameter. We highly recommend getting a 3/4in garden hose (instead of a standard 1/2) for a better water flow to save time. A 3/4-inch hose can deliver about three times the water of one with a 1/2-inch diameter.

Will the chosen firewood have any impact on the maintenance of the heater?

The rule of thumb is to use as dry the firewood as possible if you want to have less maintenance work on the heater. 
The dryness of the firewood is the first characteristic that needs your consideration, and the second thing is the type of firewood. Hardwood (oak, birch, beech, etc.) produces less soot than softwood (pine, spruce, cedar, etc.).

What are the guidelines for maintenance of the Thermowood cladding?

The external finish of the hot tub is made of Thermowood. It withstands changeable weather conditions and does not require cleaning.
The durability of Thermowood is based on the special treatment process – no nutritive matter for fungi is left in the Thermowood. No chemical additives are used in the Thermowood production process – only energy and steam.
Although Thermowood can be used outdoors without surface treatment, over time, the surface will become greyish – as any natural wood does. If you wish to maintain the original Thermowood appearance, treat it with transparent paint containing some brown pigment.

CAUTION: Do not clean the Thermowood surface with any detergents and/or hard brushes as it may damage the material.

How to use the hot tub in winter?

  1. When the hot tub is not in use in the cold season, empty it completely, leave the drain valve open and secure the cover. If you expect strong winds, remove the top flue of the chimney.
  2. Drain the water at subzero temperatures. Water can get trapped in the plumbing and double walls of the heater and damage your hot tub if it freezes.
  3.  If your hot tub comes with a SPA system, please make sure the water is drained out from the hot tub and the whole system. When the water is flushed completely, turn on your massage system to blow air from all the tiny holes.
  4. Get warm garments ready before you step out from the water. Bring a chair outside, and place the fluffy bathrobe or a towel on it within an arm’s reach. You can even wrap them in plastic or some other cover to keep them away from cold and water splashes. Even if it’s just a short dash across the yard to your warm house, you don’t want that temperature shock, so please, cover your body.
  5.  You mustn’t soak for more than 15-20 minutes at a time and don’t heat the water to more than 39℃. This is a general rule with no regard to any particular season of the year, only in winter, it’s easy to get tempted and spend more time admiring the landscape while staying warm. Remember that when your head and shoulders remain in the chilly air, you may confuse your sense of internal temperature and get too hot. Overheating and dehydration are unwanted results that you must take seriously.
  6.  Wear a knitted hat while bathing. It will keep your hair dry and help to regulate body temperature.
  7.  Finally, even if your garden is not covered with snowdrifts, anything below zero on a thermometer means your walkway will be slippery. Get a pair of shoes with non-slippery soles next to your softest garments to make your way from the garden safe and comfortable.

P.S. If you rather wait until spring to keep the temperature differences more in control, read the How to prepare the hot tub for winter? question.

Troubleshooting

Why is water leaking from underneath the tub?

Underneath the hot tub, near the drain valve, there is a small hole for the condensation water to escape. When you use the heater for the first time, there might be a bit of brownish fluid coming out. It is normal, it’s not a leak. If you want to protect the decking, you can slide a tray/plate underneath. 
Condensation occurs while the water inside the tub is cold and you begin heating it. There should be less and less dripping when the water becomes warmer.

What should I do if the water level gets lower?

Signs

The water level is lower than on the previous day

Cause
If it has not been splashed away by children, please check for the following:

  • Rip or holes in water filter hoses
  • Leaking water drain valve

Solution

  • Repair the hoses with a patch kit
  • Finger tighten all filter caps
  • Tighten the water drain valve or add sealant tape to its thread

Why is the chimney moving?

Sometimes people use the wrong ends of the tubes and then they do not attach well.

In the image below you can see that the lower ends of the tubes (F and C) have uneven edges, while the top edges are smooth.
This uneven edge has to be driven down.

If everything is done correctly, but the chimney still feels somewhat wobbly, try putting some pressure to stick the chimney tubes one into another, turning them right and left to make sure they attach to each other well.

If the problem persists, try swapping the pipes. Fit a different pipe into the elbow and see if it works better.

Also, in windy locations, we advise using a chimney bracket (included in the package of the Essential line hot tub models with an integrated heater) to ensure more stability.

How to remove sediments from the hot tub bottom?

Signs

Dirt or sand on the tub bottom

Causes

Heavy use, getting in the tub with sand on the feet

Solutions

  • Switch on the massage system to stir the water so that the filter can suck in the impurities with water.
  • Use a pool vacuum to clean the bottom of the hot tub.

How to remove algae in the water?

Signs

  • Greenish water
  • Green or dark spots on the hot tub liner
  • The liner is slippery and has a bad odour

Cause

Algae buildup in the water in your hot tub is caused by improper use of sanitisers and pH level management.

Solution

  • Adjust the pH level following the chemical product manufacturer’s instructions.
  • Clean the bottom of the tub.
  • It would be best to drain the water, clean the liner, fill new water and follow the chemical product manufacturer’s instructions thoroughly.

How to remove debris on the water surface?

Use a skimmer to remove debris such as leaves, insects etc. 
Your hot tub may be standing too close or under the trees if such problem occurs regularly. Consider relocating the hot tub.

What do I need to do if there is suspended matter in the water?

Signs

Water is cloudy or milky

Causes

  • The water pH level is too high, and the water is too hard.
  • There is foreign matter in the water.

Solutions

  • Adjust the water pH level following the chemical product manufacturer’s advice.
  • Clean or replace your filter cartridge or the fibre balls.