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But What About Sauna Ventilation and Drainage?

Worried about the ventilation and drainage of your sauna?

Having a personal sauna comes with its fair share of operation and installation questions. Making your sauna a seamless part of your home means figuring out how it will affect the existing structures of your house. No one wants their drywall or floor to suffer! The good news is that we have all the answers to your ventilation and drainage questions. The even better news is that it’s easier than you might think!

Does my sauna need to be vented?

Ventilation in indoor sauna near ceiling.

Yes, but no need to worry: All Almost Heaven saunas have not one, but TWO built in vents. One vent, under or behind the heater, helps to bring in fresh air for the heater to operate. The second will be near the ceiling opposite the heater, a sliding or spinning cover that can be adjusted for your comfort. If you want some fresh air flowing through, great – open that vent up! If you’d rather keep all that hot air in, keep the vent closed. No need to be concerned if you opt for closed vents. The softwood construction of the sauna room is designed to be breathable as well.

You do not need to build any additional ventilation onto your sauna. Venting the sauna to the outside may even cause your sauna to take longer to heat up due to differing temperatures and barometric pressures. Just keep your sauna an inch or two away from your existing walls and you’ll be golden.

Regarding steam or humidity wreaking havoc on your walls, the amount of humidity created will be far less than a shower. Between the absorbent softwood of the sauna room and the dry heat, far less steam will escape the sauna – even with your vents open.

Does my sauna need a drain?

Understandably, most people don’t want to flood their homes. However, keep in mind that a sauna is not a steam room! While you’re able to create humidity by sprinkling water over the stones, the sauna room is constructed of a softwood that absorbs moisture. The heat then keeps the dampness at bay and helps to dry out the space. If you’re picturing yourself dumping buckets of water over the heater and it spilling all over the floor, know that is way too much water for the heater to handle at once. A ladleful will do, and your floor will stay dry!

Since indoor saunas are made to use your existing flooring, choose a flooring that is heat and water-resistant (concrete, tile and luxury vinyl planking are some of our favorites! And if you want a floor made to match and fit the rest of your space, we have an option for you!). At most, you might experience condensation that will either dry up with a few extra minutes of dry heat, or can be easily wiped up. For residential saunas, a drain is not necessary!

Now that you’ve regained your peace of mind, you can enjoy your sauna in full relaxation mode! Or if concerns pertaining to ventilation and drainage have been stopping you from fulfilling your sauna dreams, go and make those dreams come true! If any questions linger, you can reach us at 888.355.3050 or

January 13, 2020 •