Pouring water onto the hot stones in the heater is how you regulate the humidity in the sauna. Wait until the stones are hot enough to make the water evaporate. To prevent the stones from breaking, you should use clean, hot tap water. Avoid using very hard water or water that is high in iron. We recommend throwing approximately a ladle of water at a time. If you need more steam, wait a few minutes and throw more water on the stones. Doing so allows the stones to regain the heat between the pourings, providing you with the best steam. If you notice water running out from the bottom of the heater, it means you have poured too much water or that the stones are not hot enough.

It depends on how often you use the sauna. If you use your sauna 3 times a week, you might need to replace the stones about once a year. If you use the sauna less, you probably should replace the stones every couple of years. Check the stones’ condition once a year or after 300 hours of heating to understand if the stones need changing. Read more about it in the stones chapter.

Pay attention to your heater’s condition, especially if it has not been used for a while.
● Check the condition of the stones once a year or after about 300 hours of use.
● Clean the stones when necessary and replace them when they have started crumbling. Read more about it in the stones chapter.
● When cleaning or working on your heater, make sure the power supply is disconnected and that the heater isn’t hot.

Heating elements only need to be changed if they break.

You can verify if heating elements are broken by removing some stones and checking if the heating elements turn red during heating. If a heating element doesn’t turn red, it is broken. When this happens, immediately turn the heater off and replace the heating element. Using the heater with a broken element risk breaking the functional elements too. Only an authorised electrical engineer can change the heating elements.

You can buy spare parts for your heater in our shop or from one of our resellers. On the Find a store page, you can find stores, online stores and sauna building companies that sell spare parts for your heater.

Empty the ash drawer before using your sauna stove.
● Start out with something small and easy to burn, like a newspaper or some small pieces of dry wood. Add more wood as you go.
● HIVE Wood can only be heated with wood logs. For Hive Wood 13, logs with a length of 30 cm are the best, and for Hive Wood 17, you should use logs with a length of 40 cm.
● When starting the fire, the flame needs more airflow. We recommend keeping the ash drawer open by about 10 mm. When the wood is burning, and you hear the wood crackling, close the ash drawer a bit more so that it remains open by about 2-3 mm. If the airflow is excessive, the wood will generate more heat and burn out quicker. Always keep the furnace door closed during heating and open it only to add firewood.
● Take a look every now and then to see if more wood needs to be added.
● When the sauna feels hot enough, it is ready for use.
● Continue adding wood for as long as you wish to keep the sauna hot.
● Avoid overheating the sauna stove. You are overheating your stove if the furnace case starts glowing red. Overheating causes the metal to deform. The guarantee does not cover this defect.
● In the case of overheating, the ash drawer and the furnace door must be closed entirely to stop the fire. If possible, cut off airflow to the room.

Choose the right stones for your stove. We always recommend buying sauna stones from the same manufacturer as the heater. Find Huum stones in our shop.
● Empty the sauna stove’s ash drawer before each heating since it is used to adjust the draught.
● Clean the heating surfaces of the sauna stove regularly, at least once every 20 uses.
● Check the condition of the stones about once a year or after 300 hours of heating. When necessary, replace the stones (read more in the stones chapter).
● At least once a year, it is necessary to clean the chimney and the flues. We recommend checking the chimney and flues at the same time as checking the stones!
● If the sauna has not been used for a long time, have a specialist check the furnace, grate and ash drawer condition before heating the sauna stove. If necessary, arrange for the condition of the chimney and the flue to be checked as well. Also, if necessary, allow the specialist to undertake further cleaning.

Setting up a sauna heater is usually a process that takes a few hours, but that varies with the expertise of the installer and the complexity of the build. Generally
if you’re installing a sauna heater to an existing space, the installation would be part of a renovation of that space to make it vapour proof, and to run wiring for the heater and controller through the walls.