Can Rigid Foam Board Be Used For A Short Return Air Duct? - HVAC - DIY Chatroom Home Improvement Forum

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


Thread Tools Display Modes
Old 03-09-2014, 09:26 PM   #1
Join Date: Dec 2009
Location: Hagerstown, MD
Posts: 364
Rewards Points: 250

can rigid foam board be used for a short return air duct?

Currently, my furnace intake is wide open. There are no real returns in the house. There's a 24x24 hole in the wall that separates the laundry room (where the furnace sits) from the rest of the house, and that is where air is sucked through right now. The intake is facing the other way. I'm pretty sure at this point that not only is air being sucked through the 24x24 hole, but it's probably also being sucked through the laundry room exterior door, as well as the cold basement door, so I'd like to get a duct over from the living room duct to the intake to minimize this issue (I think that's the reason that my heat will run all day long, even calling for aux heat in 50 degree weather, but when the heat is turned off, the interior temp holds just fine for several hours on a day like today).

I see that metal is extremely expensive. Is there any problem with using rigid foam board to construct a duct to get me from point a to point b for the return only? I'm going to have to go vertical and run it across the ceiling and then drop it back down, and foam is much much cheaper than metal. I also can not find anyone in my area who has that fiberglass duct board.



Tonglebeak is offline   Reply With Quote
Old 03-09-2014, 09:56 PM   #2
biggles's Avatar
Join Date: Jan 2008
Location: Long Island
Posts: 3,630
Rewards Points: 2,000

can rigid foam board be used for a short return air duct?

cardboard box break it down to size it in


biggles is offline   Reply With Quote

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
How to clean un-lined round duct board?? a1481155 HVAC 4 05-08-2013 05:52 PM
How to use fiberboard as a duct return Scooby333 HVAC 1 03-17-2013 05:29 PM
rigid foam board over subfloor? wombosi Building & Construction 2 12-21-2011 09:54 PM
Hardiboard siding over Rigid Foam Board mike_duclos Building & Construction 7 06-24-2011 08:17 PM
Installing deck ledger board over foam board? RickT Building & Construction 5 11-06-2006 11:50 PM

Top of Page | View New Posts