Question:
I want to build a sauna on a sled of sorts to avoid a building permit.
>> I am thinking of using a one burner propane stove under lava rocks for
>> heat. I think for a family of four an adequate size is 4x8. Anyone
>> have any ideas or cautions about this?
Answer:
I built something like this several years ago. It is 8'x8'x8' with 4x8
sheets of cedar on the inside, R-11 (? 4" thick) insulation, 4x8
T1-11 panels on the outside. I was planning a one burner propane, but
for simplicity, decided to use a standard 220v 3kw electric room
heater, so this is mostly a dry sauna. When we want a wet heat, we use
a water spray bottle to spray mist into the air. About 8 or 10
squeezes on the bottle after reaching temperature makes it plenty
moist.
I have found that the 8x8 foot print is just right for 4 adults on two
2'x8' benches. I think the 4x8 that you are planning might be too
small.
The heater works very well. On a 30F night, it takes only about 20
minutes to heat the room to 95F.
