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Window unit size?

FL Guy

Well-known member
Joined
Dec 21, 2022
Messages
302
For the folks that used foam board insulation in your garage, what size window AC unit did you end up going with?
How big is your garage?
 
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PoorUB

Well-known member
Joined
Mar 29, 2021
Messages
11,648
Location
Fargo, ND
Why not tell us what you have and we can give you a best guess?

Size of the garage, type of construction, what part of the country you live in?
 
OP
F

FL Guy

Well-known member
Joined
Dec 21, 2022
Messages
302
Why not tell us what you have and we can give you a best guess?

Size of the garage, type of construction, what part of the country you live in?

Metal tubular building.
930 sf, 12’ walls. About 11000 cubic feet.
Currently insulated with radiant barrier and 2” foam board.
Central FL
 
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PoorUB

Well-known member
Joined
Mar 29, 2021
Messages
11,648
Location
Fargo, ND
Metal tubular building.
930 sf
Currently insulated with radiant barrier and 2” foam board.
Central FL
So about an R10? 18,000 BTU should it, 24,000 BTU will for sure.

I have a stick framed garage about the same sqft, 2x4 walls and crappy attic insulation with 18,000 BTU in North Dakota and it does just fine. I had a 12,000 BTU window unit that would keep up as long as it was started early in the day.
 
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FL Guy

Well-known member
Joined
Dec 21, 2022
Messages
302
So about an R10? 18,000 BTU should it, 24,000 BTU will for sure.

I have a stick framed garage about the same sqft, 2x4 walls and crappy attic insulation with 18,000 BTU in North Dakota and it does just fine. I had a 12,000 BTU window unit that would keep up as long as it was started early in the day.

I think each 2” panel has a R value of 7.85.
Forgot to mention….
The roof and south wall has 2” panel.
16x10 door faces west.
The east wall faces a wooded lot and north side gets no sun. The east and north side has 3/4” foam board along with the radiant barrier.

It’s not 100% airtight, but I’m working on it.
 
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