Comparison of Wood-Burning Sauna Stoves Harvia 20Pro, Harvia M3, Huum Hive Heat and Cozy 12

The 1st type includes Harvia stoves. A stove of this brand mainly heats up due to the airflow between the hot housing of the firebox and the stove casing. The stones on the top of the stove also produce heat but less. Such stoves heat the sauna faster, but the air is drier, and because the number of stones is small, it is difficult to get a lot of steam in the steam room. A heated sauna is unlikely to get more than 45% humidity.

The 2nd type of stoves are Huum Hive Heat and Cozy 12. The stones in them should be put around the entire stove, there are much more of them than in Harvia stoves. During burning, the walls of the firebox heat the stones, and the stones heat the air and evaporate water to produce steam. Heating a sauna with such stoves takes more time, but they also keep heat longer after they are heated. When the sauna is heated, you need to add less firewood and less often to maintain a constant temperature. The advantage of such stoves is that you can get more steam and control its amount easier than with Harvia stoves. With such a stove, you can reach a humidity of 65% in a heated sauna.