Design your sauna
Your room, drawn by our rules.
Move the walls to the size of your space. The benches, the heater and the wall area follow, worked out the way we work them out for a client's drawing. Then send the room to us.
Upper bench 24" deep at 36" Lower bench 18" deep at 18" Heater
- Heater for this room
- 6-9 kW
- Volume
- 252 cu ft
- Wall area
- 168 sq ft
- Glass
- 12 sq ft
- Circuit
- Dedicated 240V, sized to the heater
Our table gives 6 kW; the manufacturer's rule, which counts every square foot of glass, gives 9. We size it on the site visit.
Custom indoor projects from$12,900
Complete custom sauna build for your space: framing, insulation, tongue-and-groove wood interior, custom benches, heater and control installation, and full finishing. Built to fit your room and tailored to your needs.
A starting point drawn from our own rules, not a quote. The written quote follows a site visit.
Why these numbers.
A sauna is a system: the heater, the volume, the glass, the benches and the air depend on each other. This is the section we draw every room from. Read the reasoning, or see the full process and pricing.
- 1
The heater is sized to the room and to its glass.
Glass gives heat away faster than an insulated wall, so it counts. One of our rooms, 451 cubic feet: sizing by volume alone says 9 kW, counting its glass says at least 10.5. It went on the drawing at 12.
“I had pre-purchased my Harvia heater, but I wish I had purchased it after consulting with him because I would have likely selected a more robust heater to promote a quicker heat up.”
Marnie C., Alameda · Google review - 2
Upper bench at 36", 24" deep.
Heat rises, so the upper bench is where the sauna is felt. 24 inches is room to lie down.
- 3
Lower bench at 18", 18" deep.
The step up, and the cooler seat for the first round.
- 4
Intake low beside the heater, exhaust low on the far wall.
A 4" intake 4" off the floor, so fresh air meets the heater first. The 6" exhaust sits 6" off the floor under the lower bench, so the heat is drawn down through the benches instead of straight out of the ceiling.
- 5
A dedicated 240V circuit, with the switching outside the heat.
A breaker and wire sized to the heater's kilowatt rating, GFCI-protected, with a disconnect nearby. The contactor box goes on the outside of the room.