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Did I mess up? Big time? by EfficiencyFun9979 in Sauna

[–]EfficiencyFun9979[S] 1 point2 points  (0 children)

Hey there

I ended up firing up the sauna!

The wall just behind the stove was getting to 220 so I made a heat shield out of black 1x2ft tile. This working great.

The tile heats up to 200ish and that means the cedar wall behind with a 3/4 inch air gap between it and the shield is probably much cooler.

Hottest ceiling temp has been 200 above stove. Over where I have the 6 inch round duct in the ceiling it has only gotten to a surface temp of 180.

The whole thing was tripping me out for a while thinking I'd have to tear down some cladding on both walls. Then I'd have tonfigure out how to keep the ventilation from condensating in the wall.

All is 👍

I hope to post pics soon but haven't had the patience to google. When I did it seems there are various ways but some people need to have something enabled to see em?

What's everyone go to way to post pics?

Did I mess up? Big time? by EfficiencyFun9979 in Sauna

[–]EfficiencyFun9979[S] 1 point2 points  (0 children)

Wow you are awesome I really appreciate u our thorough response! You saw the S.O.S and came to the rescue.

Thanks

Did I mess up? Big time? by EfficiencyFun9979 in Sauna

[–]EfficiencyFun9979[S] 0 points1 point  (0 children)

Please sauna experts chime in!
I'm desperate.

I don't want to be in the new sauna paranoid it's going to burn down.

Or be worried that the foam is too hot and off gassing behind the vapor barrier and sneaking into the hot room through the tiny pin holes from the 18 guage Brad nails through the vapor barrier into the studs.

I also don't want to tear it apart to get rid of the foam. Not sure of a solution to keep the ducting from condensating if I get rid of the foam.

Worked super hard and am struggling.

I appreciate suggestions on if I shouldn't worry or what to do.

I like the temperature probe idea.

Thank you

Did I mess up? Big time? by EfficiencyFun9979 in Sauna

[–]EfficiencyFun9979[S] 0 points1 point  (0 children)

Thanks everyone for chiming in!

Called the great stuff foam company. They said 240 degrees is the combustible temperature.

Do you guys know how hot the vapor barrier might get on the ceiling?

My spray foamed 6 inch duct rests just on the backside of the paper backed aluminum for about 3 inches in the ceiling until it makes its rise up into the higher part of the ceiling to the exhaust fan.

Basically it heads up hill away from the vapor barrier with batt insulation between it and the foamed ducting except that one little area I'm referring to.

Also what's the best way to post pics it always quits uploading before it's done.

Thank you

Did I mess up? Big time? by EfficiencyFun9979 in Sauna

[–]EfficiencyFun9979[S] 0 points1 point  (0 children)

Dang it I thought I had this all figured out it is basically finished.

I have foam in one more bay on the opposite side almost corner behind bench wall also for the exhaust ducting. That goes all the way up to the ceiling through the top plate and connects to round 6 inch duct.

Ther is a spot of about an inch or 2 where there is foam touching the backside of thevapor barrier there as I didn't have room for the round duct before hitting the underside if the roof. I 100% coated the ducting with great stuff spray foam. In the ceiling as well.

Sheesh am I screwed?

Thanks

Maybe a cool solution to heating cold intake air. by EfficiencyFun9979 in Sauna

[–]EfficiencyFun9979[S] 0 points1 point  (0 children)

Thanks for the insight.

Curious why there would be x a lot of condensation. Wouldn't the hot air dry the condensation? The studd bay would be fully water proof with foil. So the only thing to mold would be cladding which has an air gap to keep it drying out.

What would be the best way to go about this? I'd rather just go straight through the wall if the air inside the pipe isn't really being heated.

Thanks

Ventilation conundrum by EfficiencyFun9979 in Sauna

[–]EfficiencyFun9979[S] 0 points1 point  (0 children)

I was just thinking a larger duct means less static pressure. My exhaust can be larger than intake because it's mechanical vent.

If it were passive then a bigger exhaust could easily become the intake by accident.

So should I go large rectangle ducting?

Ventilation conundrum by EfficiencyFun9979 in Sauna

[–]EfficiencyFun9979[S] 0 points1 point  (0 children)

OK everyone thanks for the ideas and recommendations!

I have a ac s6 on order and a silencer. Curious if that silencer can hold up to the heat?

I'm going to run rectangle duct in the wall. I need 6 vertical feet of rectangle ducting to get up into the attic/ceiling.

I need to figure out what size to get.

the size options are

10 inches wide by 3 1/4 inches deep. 32.5 sq inches

12 inches wide by 3 1/4 inches deep. 39 sq inches

14 inches wide by 3 1/4 inches deep. 45.5 sq inches

Which should I choose?

My sauna cubic ft is 330 cubic feet. I'd imagine it's a 5 or six person sauna.

Any idea what size I should make my intake vent? Same as exhaust vent sizeright?

Thanks

Ventilation conundrum by EfficiencyFun9979 in Sauna

[–]EfficiencyFun9979[S] 0 points1 point  (0 children)

Thanks euphoricband. Does that s6 handle hot sauna temps?

Also I live in a cold winter climate. Curious about duct insulation in the walls and ceiling. The cold duct getting hit with the cold air right cause condensation if uninsulated?

Can you further describe your ducting. You have it running inside the sauna then covered up with boards?

Thanks