Bathroom Fan Vent

gruntman · 03-10-2010, 09:55 AM

Installing a vent for my bathroom fan. I just saw that I didnt have one and it was emptying into the atttic. Do you run it to the roof or can you take it out to the fascia board below the guters - could put a vent cover on it? What do you think? bad idea?

AaronB · 03-10-2010, 12:35 PM

I say run it through the sidewall if possible... they make nice parts to do this.

Stephen S. · 03-10-2010, 12:59 PM

HD or lowes have the venting kits for sale for like 20 bucks, you can find them at the vent display... you can choose between venting out the roof or wall depends which one you are more comfortable installing.

gruntman · 03-10-2010, 01:04 PM

Do you mean something like this?
Here is a part I found for running it out the facia board on the 2nd floor.

http://www.broan.com/display/router....oductID=100264

drtbk4ever · 03-10-2010, 02:17 PM

I'd think running the vent through the fascia would be more difficult than running it through the roof. And I suggest you do NOT install the vent in the soffits. So wall or roof, but not soffits.

See this thread on the topic.

bath fan questions

Stephen S. · 03-10-2010, 02:31 PM

Gruntman, yes it's something like you posted. I believe the ones in HD or Lowes come with a pipe, zip tie, etc, even better.

gruntman · 03-10-2010, 02:32 PM

Nice threads - thanks. I see the problems with mounting the vent right under a vent that would then suck the air right back into the attic. I dont have soffit vents in my house so perhaps this would not be an issue for me.

Jim F · 03-10-2010, 04:48 PM

I ran mine out the sidewall of the gable end. Anything I can do to avoid roof vents and skylights in this Northeast climate I will do. Venting into the attic is a very bad idea. Mine from the previous homeowner stopped about 2 ft from the gable vent fan. I extended it out to a proper vent similar the the one in the link.

the roofing god · 03-10-2010, 05:02 PM

straight up the the roof would be my recommendation,when you have bends etc. in the tubing it tends to accumulate crap in there,run it straight up,and cut off any extra tubing . talking shingle type roof though,need something totally different for a flat roof

Jim F · 03-10-2010, 07:02 PM

I agree, straight up through the roof makes the most sense as long as you have the knowlege and skill to properly seal it from leaks. The one in my first floor addition is through the roof. I just make sure the snow is cleared from around it with a roof rake, which is one of the smartest purchases I have ever made.

AaronB · 03-10-2010, 09:16 PM

I say that since this is just a fart fan, and not a dryer vent, then go through the side wall. This will eliminate a penetration through the roof without anything accumulating within the pipe.