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?
Last edited by mrlouie; 10-07-2010 at 09:10 PM.
Reason: Added really bad MSpaint drawing!