Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 10-04-2012, 10:41 PM   #1
Newbie
 
Join Date: Jan 2012
Posts: 26
Share |
Default

Bathroom fan vent through roof --straight up?


I have a bathroom fan that needs to be vented through a hip roof. I am using rigid vent. I have the opportunity to pretty much go straight up to get through the roof, and it would be less than a 36" run.

Is it best to just go straight up?

Or should I run horizontally for a bit and then go straight up?

Thanks for any tips!

domh is offline   Reply With Quote
Old 10-04-2012, 11:12 PM   #2
Member
 
Join Date: Sep 2012
Posts: 1,791
Default

Bathroom fan vent through roof --straight up?


Air exhausted from a bath can have relatively high dew point temperatures so if possible it's better if you can run it horizontal to the soffit with some down slope so the condensation in the pipe can drain to the outdoors in colder months.

Fairview is offline   Reply With Quote
Old 10-05-2012, 12:26 AM   #3
Member
 
Join Date: Aug 2010
Location: metro
Posts: 1,041
Default

Bathroom fan vent through roof --straight up?


we ran ours straight up through roof but our run is only about 14inches
federer is offline   Reply With Quote
Old 10-05-2012, 06:05 AM   #4
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 26,248
Default

Bathroom fan vent through roof --straight up?


For that short a distance as long as you insulate the pipe it will be fine.
I use PVC as the vent pipe so there's no rusting.
joecaption is offline   Reply With Quote
Old 10-05-2012, 06:27 AM   #5
Member
 
Join Date: Sep 2012
Posts: 1,791
Default

Bathroom fan vent through roof --straight up?


In this application insulation is of little value without a heat source. We can look at the bath mirror condense at 75F and have a good idea what a pipe in the attic at say 45 is going to do. Immediate water draining back unless the fan is way better than the ones I've seen.
Fairview is offline   Reply With Quote
Old 10-05-2012, 07:22 AM   #6
Member
 
Join Date: Oct 2012
Posts: 126
Default

Bathroom fan vent through roof --straight up?


Quote:
Originally Posted by Fairview View Post
Air exhausted from a bath can have relatively high dew point temperatures so if possible it's better if you can run it horizontal to the soffit with some down slope so the condensation in the pipe can drain to the outdoors in colder months.
This is interesting. I didn't think of this. I have the same issue as the op of this thread and is an upcoming project.

Thanks!

JohnC20 is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Can I use one roof vent for 2 bathroom exhausts fans? P550 General DIY Discussions 19 05-18-2014 09:41 PM
Bathroom fan damper missing is roof vent damper enough?? wantboost HVAC 5 11-10-2011 04:29 PM
bathroom fan vent exit? treerat Roofing/Siding 1 03-11-2011 01:59 AM
How to vent eaves if no overhang, metal roof, Texas? pj99 Roofing/Siding 7 06-04-2009 02:58 AM
can I 'patch in' a bathroom vent into my kitchen's stove hood vent? joeyboy HVAC 2 09-10-2007 12:36 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.