Hi, new and looking for any advice... have been talking with E&E (hope the new procedure is going well, Ernie!)
I am putting a 6" RMH in my sauna building (3/4" plywood floor with cement patch overlay, 16" above grade, reinforced underneath, 12" o.c. floor joists), with the burn unit in the sauna room, and the massive bench extending through the wall into the changing room. The exhaust ducting will route through the 10' bench back into the sauna room and exit the ceiling there.
I won't even mention the 22.5 degree angles I built this building with.
I've watched all the youtube videos, read the RMH bible several times, scoured E&E's suggested video, but have no real hard facts about passing this thing through the wall. I have the feeling that the burn unit will be little more than 18" from the wall to be passed through, so the gases will still be fairly hot when they initially pass through the wall... any wise counsel would be greatly appreciated.
Kelly O. : Welcome to Permies.com, our sister site richsoil.com, and the Rocket and WoodHeaters forum threads!
With E & E being so busy, consider the time they gave you as a serious boon! Here at Permies we say that the problem IS the solution(!), probably the
true answer is the solution lies in the problem . Most of the hottest bits of your RMH will be well insulated by the thermal mass, the temps at the points
of pass thru are never going to be voter than your butt can tolerate for a 1/2hr,(?)
The exact type of thermal break at this point depends on your budget mostly, some ceramic fiber batting sealed up in Nomex should work to seal air
leaks while a large mesh screen provides the thermal break and a degree of privacy between the sauna and changing area as needed !
You have described adequate (I Think) bracing under your Sauna, but not about insulating the floor from the RMHs high temps!
YOU-TUBE ! Oh what a dirty word! Because u-tube is So hungry for content they will give space to any video, with no pretense of any screening for safety,
or basic attempt at honesty, totally hands off, that leaves all decision up to the very people that at there to learn! be watchful, be careful, be safe!
Mylar or aluminum foil type reflective sheets reflect 80 - 85% of the radiant heat back into the room when installed with an air gap to both sides !
a google search will find it in your area usually in a roll 4' high ! Come back often, and show us pictures For the Good of the Craft ! Big AL
Success has a Thousand Fathers , Failure is an Orphan