myscreenname said..
I reckon that's pretty good, well done! I'm getting an indoor one built 2m x 1.5m. Kit is $10K, includes heater, door, led downlights, benches and internal ceder panels. I'm expecting framing, insulation, window, electrical connections, cladding and internal build to cost me another $15K.
25k seems like a lot, however there's a lot of work that goes in to it. The only sauna builder I know in WA is Patric from Custom Built Saunas in Welshpool, and I reckon he would have quoted me >$20k for my build, but would have only done it electric and he's quite protective of his Cedar bcos there's no more coming in the Aus. I put in ~300hrs designing, redesigning, ordering, building, cutting, routing...
Mine gives me the best sauna I have experienced... not sure about the cold plunge pool, that's just nasty even at 15c water temp.
I was initially quite concerned when testing and it wouldn't go above 70c, which is the reason it doesn't have any ventilation except around the door.
Previously in fitness centres the set temp was 80c and I would try and get the temp to 100c, by cooling the thermostat, so 70c was very disappointing, but the strange thing was that 70c was crazy hot and I couldn't stay in for longer than 5 mins, we're talking heart pounding, facial veins popping up, minor burns.
I then measured the relative humidity @ 65% so 70c = Heat Index 305c!!!
Whereas gym electric it's usually 80c, but RH of usually <10% = 80-90c heat index.
www.calculator.net/heat-index-calculator.htmlI had no idea about a Heat Index until I tried to figure out the deal with the low temp.
The more humidity the more power you need to heat the air.
They sell electric heaters with water tanks... Tylo & Helo call them Bio Water Technique... which allows you to raise the RH to 40%.
Looking at last nights session, I started 15c @ 75% RH, max RH was 90% 15 mins after lighting, peak temp was 66c @ 80% (332c heat index) 45mins after lighting and then both temp and RH started declining to end at 52c @ 57% (121c HI which was enough to make you sweat but not much more) 100mins after lighting.
The pot belly has 10kW output and for my m3 I need 6-9kW, so I run it with just 2-3 small logs burning which gives me 55-60c @ 50-80% RH... yeah, I can't control humidity down unless I ran the stove with the door open. I start the fire in 15secs with a blow torch and so far all the wood has been free.
60c @ 65% (203c HI) is about perfect for me, but it's hard to maintain that exact figure, but I guess a little variability adds to the experience. The Mrs lies on the ground at this temp/RH and there's also a lot less temp stratification with higher RH.