bathroom exhaust - DIY Chatroom

maintenance · 04-03-2005, 12:01 PM

I have just finished adding a master bathroom. I currently have an existing bathroom that is vented directly into the attic(in place before we moved in). Do I run the vent duct up and out the roof? Same with the other existing bathroom?

Mike Swearingen · 04-03-2005, 01:32 PM

Yes, or an exterior wall. The primary purpose of bathroom exhaust vents is to dump excessive moisture outside of the home.
Mike

maintenance · 04-03-2005, 03:30 PM

Quote:

Originally Posted by Mike Swearingen

Yes, or an exterior wall. The primary purpose of bathroom exhaust vents is to dump excessive moisture outside of the home.
Mike

How would I get it to vent out a side wall? The exhaust is in the ceiling. Would I run it down the stud wall? If so what type of duct would fit ?
Thanks

Teetorbilt · 04-03-2005, 04:08 PM

You can usually find a way to duct it to a gable end or soffit. Try to keep the run as short as possible. If the run is going to be too long, up and out is the answer.

Mike Swearingen · 04-03-2005, 04:54 PM

There are exhaust vent covers for walls.
And don't forget to insulate the duct through any unheated space, such as the attic, to help prevent condensation from forming and running back into the exhaust fan during the winter.
Good Luck!
Mike

maintenance · 04-03-2005, 10:09 PM

What would be too long a run. From the exhaust vent to the gable end is about 16'. Is that too long. This would be so much easier than going thru the roof. For me.

maintenance · 04-03-2005, 10:11 PM

Quote:

Originally Posted by Teetorbilt

You can usually find a way to duct it to a gable end or soffit. Try to keep the run as short as possible. If the run is going to be too long, up and out is the answer.

What would be too long? From the exhaust vent to the gable end is about 16'. I would prefer the gable instead of going thru the roof. Whats your thoughts?

Mike Swearingen · 04-03-2005, 11:18 PM

You can exhaust it where you prefer. It's better to keep it "shorter" because of the possibility of condensation forming in the duct, but if you insulate it well, it will work.
You can just wrap batts of insulation around the duct and hold it together with duct tape. Don't wrap it tight enough to compress the insulation too much. That defeats the purpose of it.
The main thing is to exhaust that moisture from the bathrooms outside.
Good Luck!
Mike

Teetorbilt · 04-03-2005, 11:56 PM

It's going to be close! Code allows for a 25ft. run but you have to knock off 5ft for a 90deg. elbo. So now you have a 20ft. run. Code also says that you have to have a 1-12 drop so you're going to have to come up from the fan somewhere around 2 to 3 ft. which gives you a 17-18 ft. run. Pretty close.
CHECK YOUR LOCAL CODES before doing anything!

rabadger · 04-04-2005, 05:17 PM

Just remember that the HVI CFM rating on bath exhaust fans is at 0" of static pressure. When you add duct the actual performance drops rapidly. So, if you want to move air go the shortest distance possible.

Teetorbilt · 04-04-2005, 10:14 PM

You can also compensate by boosting the fan output, say from 50 CFM to 80 CFM or adding a booster fan in the run.

747 · 04-24-2005, 08:34 AM

you never vent a bathroom vent out the roof unless absolutely necessary it could cause a leak. You should vent out the gable end of a house. It would be the same a drilling for a dryer vent. I just seen Tommy Silva do that and say that on Ask this old house. SORRY TEETOR DIDN'T DIDN'T READ ONE OF YOUR FIRST POST ON THIS THREAD.YOU ARE ABSOLUTELY CORRECT WITHOUT DOUGHT. WHAT NO THUMBS ON THIS SIGHT.

lolitad · 12-09-2007, 06:57 PM

'I have a blue bath with some white spots and dolphins at closet and carpet... It looks clean but I want it to get some life.. what should I add to it? should I change the color?

**AtlanticWBConst.** · 12-10-2007, 08:13 AM

Quote:

Originally Posted by lolitad

'I have a blue bath with some white spots and dolphins at closet and carpet... It looks clean but I want it to get some life.. what should I add to it? should I change the color?

Hi,

Thanks for posting your question on the site.
What you really need to do, to get answers to your questions, is to start a new thread in the "Home Decorating" forum. That is the proper way to get answers to an unrelated question (to this thread) that you may have.

(What you are doing here is what is refered to as "High-Jacking" someone else's thread =

)

lolitad · 12-10-2007, 08:27 AM

thanks for your answer.. I'm new here so.. sorry
I'll try to post a new thread with my questions
thanks one more time