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fan hood/exhaust

Posted: Sun Jan 06, 2019 4:35 pm
by vwcilon
I was thinking of ducting the fan hood out of the house instead of the ole filter/recycled air option. Question is, should I/do I need to have a dedicated duct run up and out through the roof...….orrr can I tap into a nearby bathroom fan that is up and through the roof.
I guess the real question is, do I really have to make another hole in my roof??

Re: fan hood/exhaust

Posted: Sun Jan 06, 2019 5:17 pm
by Shannon
It should be a dedicated duct for sure and it does not have to necessarily exit through the roof. It can go through a wall if you are close enough. I recommend duct runs of less then 12' and limited elbows. Also using rigid ducting instead of flex ducting really helps flow.

Re: fan hood/exhaust

Posted: Sun Jan 06, 2019 5:36 pm
by vwcilon
ahhhhh thought you'd say that LOL
I have a short run to outside wall, maybe 6 feet, but have brick on the outside i'd rather not disturb. So I guess I could go up into the attic and then over and out through the soffit?

Re: fan hood/exhaust

Posted: Sun Jan 06, 2019 6:47 pm
by A. Spruce
Soffits are not the best place to vent wet air, as it can get drawn up into the attic and cause some mold/mildew issues. If venting in soffit is NOT near a vent, you'll probably be ok, if it is in or near a vent DO NOT run the exhaust to a soffit location, a roof penetration would be better.

Going through a brick facade isn't that big a deal, the only real problem would be the aesthetics of having a vent in that particular location. If it's a public location, maybe not, if it's where nobody will see it, don't worry about it, go through the brick

Re: fan hood/exhaust

Posted: Mon Jan 07, 2019 8:06 am
by Shannon
Yup, I agree with Spruce here.