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RAYCC3 09-15-2009 11:08 AM

Cold air return situation
I recently posted about a cold air return in a basement closet. Well I have a situation after trying to move it out of the closet. I have 3 other walls that it can go on and 2 are exterior walls and the 3rd wall sits on a floor truss. I can not cut into the floor truss and was hoping that I could use one of the 2 exterior walls for the return. The wall has a ledge that has been framed out to insulate the block. Can I place a return on the exterior wall?

beenthere 09-15-2009 04:46 PM

Yes, you can. Best if you use a duct.
If you don't use duct. You better make sure it can't draw any outside air in.
Or it will raise your heating and or cooling bill.

RAYCC3 09-15-2009 06:15 PM

Thanks Benthere! I am glad I have the option to use the exterior wall. I had another question for you. How many cold air returns would I need if I have 6 supplies in my basement? My basement is 960 sq ft. I have 1 supply in each of the 2 rooms and bathroom. And 3 in a 24x18 family room.

beenthere 09-15-2009 06:39 PM

Its not the number of returns. Its the volume.

Each bedroom should have a return that draws out as much air as the supply puts in. And the family room needs to have enough return for the air your suppling to it, plus the bathroom.

So however many CFM your putting into a room, thats how much return you need.

RAYCC3 09-15-2009 06:44 PM

Thanks again! My returns seem to be taking a lot of air so I don't want to add anymore.

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