7 Simple Steps How to Heat Your Hot-Tub 

Introduction

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1. Fill with water

Estimated time: 1 hour

  • Put the water hose in the hot tub and start filling it with water. The water level should reach 10-20 cm below the top ridge of the tub.

Never start the fire if the water has not reached the required level.

Use 3/4 in diameter hose for faster filling time.

2. Prepare the firewood in advance

Estimated time: 30 minutes

  • You will need approximately 0.3 cm³ of firewood to heat up the hot tub once.
  • Prepare different sizes of firewood in advance: make some kindling, finely chopped firewood, and then have your larger logs ready.
  • Make sure you’re using kiln dried firewood to avoid smoke and ensure quick heating.
  • Use hardwood (oak, beech, etc.) only or combine softwood (e.g. pine, fir) with hardwood in equal amounts.

Recommended size is 25-30 cm long logs, split in quarters and halves.

Empty the ash pan before starting the fire.

Firewood without bark makes less smoke.

To avoid excess smoke and soot, do not burn paper, painted wood.

3. Check the water level of the hot tub

Estimated time: 30 minutes

  • The minimum fill level is 10-20 cm below the top ridge of the tub. Once the water reaches the required level, turn it off and take the hose away.
  • Put a floating thermometer into the water so you can observe the temperature.

Never start the fire if the water has not reached the required level.

Never empty the tub after bathing when the embers are still in the heater!

Put the lid on the hot tub so the water heats up quicker.

Use a floating thermometer to observe the water temperature.

4. Start the fire with the kindling

Estimated time: 10 minutes

  • Use some ready firelighters (avoid burning paper) and a long reach lighter to start the fire.
  • Use kindling for building up the fire. Keep the heater air vents open. Check if the smoke is going out of the top of the chimney.

Never leave the fire unattended!

Start with softwood kindling for faster results. Continue with hardwood.

Place the firewood inside the heater as low as possible to avoid smoke coming out through the heater door.

Start with the heater door open for better airflow. Once the fire is going, close the door & leave the air vents fully open.

5. Heat up the water

Estimated time: 2-4 hours

  • Heat up the water to the recommended temperature of 39ºC by burning medium sized firewood.

  • If you just use large firewood as soon as you have the fire going, it will take longer to heat up the water and will produce more smoke.

Never leave the fire unattended!

Stir the water with a paddle or switch on the air jets to ensure you get an even water temperature.

Check the fire every 15 to 20 mins and aim to keep the fire well alight.

Check the thermometer about 5 minutes after stirring the water to get a more accurate reading.

It takes approx. 1h to raise the water temperature by 7-10ºC.

6. Enjoy the hot tub!

Estimated time: 1 hour

  • Once the temperature has reached the desired level of 39°C then the hot tub is ready for use.
  • Do not put any more wood on the fire and close the heater air vents.

You can always drain some water out if there is too much in the hot tub.

If water gets too hot, open the lid of your hot tub and let the water cool for a bit before getting in.

You can add some cold water with the hose to make the temperature more comfortable.

7. Maintain the heat

  • If you are planning to use the hot tub for longer periods of time you can maintain the heat by placing some large firewood in the heater.

  • Use more hardwood at this stage as it will burn longer.

Never leave the fire unattended!

Never empty the tub after bathing when the embers are still in the heater!

Have the air vents open just a bit to keep a steady slow fire.

After the fire is out and you are done using the hot tub, with the water still warm, put the lid on.

If it is summer the hot tub will maintain the water temperature for many more hours. 

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Gardenvity!

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean euismod bibendum laoreet, proin gravida dolor sit.

Proin sodales pulvinar sic tempor. Sociis natoque penatibus et magnis dis parturient sodales pulvinar fermentum.