Wood-fired hot tubs

Heating up a wooden hot tub takes an average of 2 to 3 hours and heating up a hot tub with a plastic inner shell takes 2 hours. Optional expansion of the hot tubs is possible to give them an extra powerful wood stove, which can reduce the heating time to 1.5 hours.

The time that it takes for the hot tub to heat up also depends on the outdoor temperature, water temperature, size of the hot tub, whether or not you're using a hot tub cover, the type of firewood and the method of firing it up.

Dried birch and oak wood should be used to heat the hot tub. You can, of course, use other types of wood, such as beech wood, as long as it is properly dried out and untreated.

Use well-dried birch wood to heat the hot tub properly. Once up to the right temperature, we recommend using oak wood to maintain the temperature. Oak wood is a harder type of wood which burns for longer.

Controlling water temperature with an external stove
You can easily control the water temperature during your hot tub session by controlling the air supply, which you can do by sliding the ash pan and/or grille on the external hot tub stove open or closed.

Controlling water temperature with an internal stove
In the case of an internal heater, you can control the temperature by sliding the cover further to the left. Once the water has reached the desired temperature, close the grille, ash pan or cover almost completely.

It is usually the case that the water next to the hot tub stove will be warmer than the water on the other side of the hot tub, so it's normal to stir the water with a wooden hot tub paddle to ensure even distribution of temperature.