A Kirami hot tub needs a heater
A tub heater makes the water warm
Kirami offers various wood-heated heaters that are used to heat the bathwater in a hot tub. Factors that should be taken into account when choosing a heater are the size of the tub and whether the heater should be located outside or inside the tub.
The heater package consists of the heater itself and its components: a grate or grates, the rubber joints and the hose clamps used to attach the heater to the tub, and possibly an ash shovel. If the heater is located outside the tub, a non-flammable plate or similar should be placed underneath the heater to raise it up, as the bottom of the heater should be 1 or 2 centimetres higher than the bottom of the tub. The height difference ensures that the heater is emptied along with the tub. The heater needs to stand directly upright.
The water becomes warmer when it circulates through the heater. The heater is designed to use only gravitational free circulation which means that no additional pumps are needed. The magnesium anode rod protects the heater against corrosion when seawater is used in the hot tub or if water is disinfected with chlorine. We recommend to replace the anode rod every year if seawater or chlorine is used often.
Use your heater right
To prevent damage to the heater, the tub must always be filled with water if there is a fire or hot embers in the heater. The water level is sufficient when it is at least 5 centimetres above the upper water lead-through of the heater. When you are lighting a fire to the heater, make sure that the tub has water in it and when you are emptying the tub, make sure that there are no embers in the heater. The heater needs to be cleaned of ash after each use.
The tub is emptied through an outlet valve. There is a new kind of outlet valve kit available for Kirami tubs: its drainage valve works the same way as a boat’s plug. The new valve is not as prone to freezing as a traditional ball valve.
Make sure that the heater works at full power
Ensure that the inner components of the heater have been installed correctly. If they are installed the wrong way, the heater will not work fully, and it will take longer to heat the water. The heating speed of the water depends, in addition to the heater power, on the size of the tub, the quality of the firewood, the air temperature and whether a lid is used on the tub. However, the water in a 1,450-litre tub should heat up in 2 or 3 hours in an air temperature of 0 degrees Celsius.
The best and most cost-effective type of firewood is dry birch chopped into small pieces. It also creates fewer sparks than other types of wood. Regardless of which kind of wood you are using, make sure that the wood is dry: large and moist firewood may even double the heating time.
Read our tips for lighting a heater
Read frequently asked questions and answers about heaters