When selecting the correct size stove for your hot room, there are many considerations. Start with the square footage of your hot room and the ceiling height. We strongly suggest an 8′ or 9′ ceiling (the new trend in saunas is to sit higher, so your feet are at or above the level of the rocks – so a higher ceiling is the starting point.
Next is the construction materials. In northern climates, concrete or stone transfers a massive amount of cold, and if you have stone or concrete walls and/or floors, you will need to allow extra time to warm up your sauna in the colds of winter and should go up one model size. Stone looks great, but cedar walls and ceiling will heat up much faster.
We strongly recommend “AGAINST” a slatted or open floor (spaces between the boards). These hot rooms don’t want to warm up.
What temperature do you like to sauna? This plays a significant factor. Many enjoy lower temps 160 and many enjoy 220. The Kuuma provides great heat and steam regardless!
Based on how well the heating room is insulated, the Small Kuuma Sauna Stove is for up to an 8 x 8 x 9 room, the Medium Kuuma Sauna Stove is for up to 10 x 10 x 9, the Large Kuuma Sauna Stove is for bigger saunas 100 – 165 square feet. If you have any special factors like stone, large windows, concrete floors, or outside feed, always increase by at least one model size. If you have two or more of these factors, consider increasing by two sizes.