Bathroom Ventilation Duct Length - HVAC - DIY Chatroom Home Improvement Forum


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

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

Reply
 
Thread Tools Display Modes
Old 12-28-2012, 06:41 PM   #1
Member
 
Join Date: May 2012
Location: Portland, OR
Posts: 128
Rewards Points: 83
Default

Bathroom ventilation duct length


Hi all,

I'm replacing two bathroom fans. Both have runs about 25ft to the gable wall. I'd prefer to not run them vertical through the roof if I can avoid this. Accessing side wall where soffit vents are is pretty much impossible d/t cramped space/roofing nails protruding.

Is a 20ft horizontal run too far? (80cfm and 110cfm fans)

The roof does have some vents at the top. They'd be about 10 foot run, but they aren't termination vents. Previous homeowner vented to these with 3" PVC, ending with a 90deg bend facing toward said vent. Could I vent through these or is that frowned upon?

Thanks for any advice

Advertisement

Didymus21 is offline   Reply With Quote
Old 12-28-2012, 10:42 PM   #2
Registered User
 
Join Date: Mar 2009
Posts: 9,977
Rewards Points: 2,020
Default

Bathroom ventilation duct length


Usually on the box instructions... or; http://www.efi.org/factoids/bathroom_sizing.html

Gary
PS. moved you to HVAC.

Advertisement

__________________
If any ads are present in my answer above, I do not condone/support/use the product or services listed, they are there against my permission.
Gary in WA is offline   Reply With Quote
Reply


Thread Tools
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
Ventilation for Bathroom Fan? tetuanrp HVAC 14 08-16-2011 07:30 AM
Splitting duct to a new bathroom nalishaw HVAC 4 10-31-2009 02:22 PM
Regular duct tape for bathroom exhaust? dtran HVAC 1 10-27-2009 04:26 AM
kitchen wall and bathroom fans sharing duct amakarevic Building & Construction 5 06-11-2008 01:13 AM
Ventilation fan in bathroom meteors Electrical 1 04-10-2008 06:39 PM




Top of Page | View New Posts