mounting horizontal bathroom fan vertically. is it wrong?
Last Post 30 Nov 2009 05:13 PM by glenfotre. 5 Replies.
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GAWUser is Offline
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03 Nov 2009 07:03 PM
Is it wrong to install a bathroom fan in a wall even thought the instructions only explain installation between trusses, in a ceiling/floor?
I can't run the vent duct horizontal for the stated minimum length of 2-3 feet, but if I mounted the fan in a wall I could run the duct straight up without any bends.
Anybody got any ideas?
sustainable designer User is Offline
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21 Nov 2009 06:17 AM
Most bath exhaust fans can be mounted vertically in a wall, in fact some installation manuals will mention that wall mounting is an option. I often mount fans in interior, never exterior, wall stud spaces because it avoids an additional large penetration through the "vapor barrier" in high-moisture area of the house and it doesn't reduce depth of attic insulation at that point (I'm in a cold climate in Wisconsin). The fan can be ducted to vent up or down, depending upon shortest route and most practical location for a wall cap. I avoid vents through the roof. The fan won't vent with a foot of snow over the roof cap.
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21 Nov 2009 10:27 AM
Great.
Thanks
cmkavalaUser is Offline
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22 Nov 2009 09:05 AM
Posted By GAW on 11/03/2009 7:03 PM
Is it wrong to install a bathroom fan in a wall even thought the instructions only explain installation between trusses, in a ceiling/floor?
I can't run the vent duct horizontal for the stated minimum length of 2-3 feet, but if I mounted the fan in a wall I could run the duct straight up without any bends.
Anybody got any ideas?
If the instructions don't mention wall install, then I would not do it, as the bearings will burn out quicker

Chris Kavala
info@southernsips dot com
1-877-321-SIPS
FL. Lic # CBC036455, GA Lic. RLCO000624, LA Lic. # CL33845
GAWUser is Offline
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22 Nov 2009 07:51 PM
That's what I was fearing, I imagine these fans were designed and balanced specifically for horizontal placement unless otherwise stated.
I thought about calling their support line but I imagine the person on the other end would know even less about the technical aspects than most people on this forum.
glenfotreUser is Offline
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30 Nov 2009 05:13 PM
I'd contact the fan manufacturer for their opinion. If they say it is OK, get it in writing.
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