covering an air return


Old 01-23-04, 06:34 PM
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covering an air return

I had an air return in a wall that was between my kitchen and living room. It was located about 2 feet from the floor. I removed this wall and would like to cover the return opening (which is now in the floor). My house has a very open concept and there is another air return in a wall 10 feet from where the wall was removed. Would it be ok to cover that opening before I tile the floor?
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Old 01-23-04, 06:39 PM
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you must relocate it, the hvac system operates on airflow parameters, and the returns are already undersized in MANY cases. what size returns do you have and what tonnage is your equipment? we can figure it up with a ductulator. undersizing return will cause low suction on a/c mode, causing floodback of refrigerant to the compresor, damaging it. in heat will cause overfiring of gas system or high head pressure on heat pumps.
Old 01-23-04, 07:02 PM
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The opening that is in the floor is 15 x 4. I can see down in there that the duct is much wider. One problem is that this existing opening already crosses my floor joist. I couldn't find a floor register to cover it with in that size and I can't fit one in the opening because the joist keeps it from setting down in the hole flush. Are you wanting the size of my a/c or furnace?
Old 01-23-04, 07:21 PM
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I have two returns that are 24 x 6 and 4 that are 12 x 6 for a 2000 square foot house. I'll check on unit size when I know which you need. Thanks.
Old 01-24-04, 03:44 AM
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reply for hoopers

are you talking about grating size when you say 2 24x6, and 4 6x12?........or is it actual duct size that individually lead into the return plenum? Thanks
Old 01-24-04, 08:22 AM
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Lightbulb Cold air

I take it that this was a cold air return in the wall like you said.So the grill was a 14"X6" that should give you the hole in the floor about 3 1/2" X14 1/2" is all the return you got out from this. With all the other returns 2 --24"X6" and 4 --14" X 6" Id just plug this hole up. Are if you want to check it out. Cover this hole with anything. Go turn the blower on at the tstat or run the furnace. Go down and try and pull the blower door open on the furnace. If you can open it and it dont pull to hard to open it . Go for it I come up with about 364sq" return there ED
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