Bathroom Fan Venting

Users who are viewing this thread

Jon Wohlgemuth

New Member
Messages
10
Reaction score
0
Points
1
Location
NJ
I am installing a Panasonic fan in a master bath. There is attic access but there is blown in insulation in the attic walls and rafters so access is difficult. i would like to go directly out the side of the house as its only a few feet to run the venting. It's a 4 inch flexible duct but needs to be run through 2x12 joists. Can that be done? I will check with code here to see but does anyone have suggestions of what to do? The bathroom is at the corner of a house. Hope that makes sense.

Thanks for any help
 

wwhitney

Well-Known Member
Messages
5,266
Reaction score
1,335
Points
113
Location
Berkeley, CA
Maximum hole diameter is D/3, where D is the actual depth, so don't put a 4" hole in a 2x12 (11.25" depth). Depending on the CFM and the details of the run, there's a chance that a short run of 3" rigid duct would perform OK.

Cheers, Wayne
 
Top
Hey, wait a minute.

This is awkward, but...

It looks like you're using an ad blocker. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. If you'd like to support the site, please allow ads.

If any particular ad is your REASON for blocking ads, please let us know. We might be able to do something about it. Thanks.
I've Disabled AdBlock    No Thanks