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

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 10-07-2010, 07:22 PM   #1
Newbie
 
Join Date: Apr 2010
Location: Northern MI
Posts: 8
Share |
Default

Need advice on cold air return


I recently purchased a home, and in the process of doing a kitchen remodel I needed to change some of the framing. The problem is that the old cold air returns for the second floor were run between the wall studs, with no duct work and sealed very poorly, in the exact two spots where I added headers. I want to replace the two cold air returns that I have now blocked off with 6" oval returns in other spots.

Question #1 is will two 6" oval cold air returns be enough for approximately 400 square feet (2 bedrooms/bathroom/hallway) of space? I have a vaulted ceiling and a lot of the heat gets funneled upstairs by convection, if that makes a difference. There are 3 heat ducts supplying this same space, all are 6" oval. I plan to damper these as even with only 2 currently hooked up it's too warm upstairs vs. downstairs.

Question #2 is how far apart should a cold air return be from a heat register? One of the few spots I can place a new cold air return is about 5 feet from a window that has a heat register below it. Is this too close?
Attached Thumbnails
Need advice on cold air return-upstairs.jpg  


Last edited by mrlouie; 10-07-2010 at 08:10 PM. Reason: Added really bad MSpaint drawing!
mrlouie is offline   Reply With Quote
Old 10-08-2010, 06:49 PM   #2
Newbie
 
Join Date: Apr 2010
Location: Northern MI
Posts: 8
Default

Need advice on cold air return


No one liked my nifty drawing? At least call me a moron for doing it backwards!

mrlouie is offline   Reply With Quote
Old 10-08-2010, 06:54 PM   #3
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 24,416
Default

Need advice on cold air return


The general position of the returns is fine.
but. You'll need more then just 2-6" ovals. if you want it to cool ok in summer.

3 or 4-7" ovals.
beenthere is offline   Reply With Quote
The Following User Says Thank You to beenthere For This Useful Post:
mrlouie (10-08-2010)
Old 10-08-2010, 11:17 PM   #4
Newbie
 
Join Date: Apr 2010
Location: Northern MI
Posts: 8
Default

Need advice on cold air return


Thanks for your reply, the help is appreciated. Would using two 3 1/4" x 14" ducts be any better? I've read that rectangular ducts can be bad for flow as well though... it's just that I am so very limited on walls that aren't either exterior walls, or load bearing interior walls. I'm not sure where I could run a 3rd or 4th return through the framing unless I did 2 returns side by side in the room on the left in my picture.
mrlouie is offline   Reply With Quote
Old 10-09-2010, 04:33 AM   #5
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 24,416
Default

Need advice on cold air return


2 returns side by side is fine. And is how it is often done in the hallways of the second floor, and or master bedrooms.

3X14 is better then 6" oval. But only 2 of them won't be enough either. In the summer.
beenthere is offline   Reply With Quote
The Following User Says Thank You to beenthere For This Useful Post:
mrlouie (10-12-2010)
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
Cold air return for basement room mr.Z HVAC 6 09-08-2010 04:17 PM
cold air return ponch37300 HVAC 9 02-15-2009 09:55 PM
advice on cold water pipe in basement garage area cambie Plumbing 6 10-15-2008 01:29 PM
move cold air return or add extra hot air CamL HVAC 2 03-26-2008 12:43 AM
cold return relocation mfwhite22 HVAC 4 01-22-2008 05:08 PM




Top of Page | View New Posts

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