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Discussion Starter · #1 · (Edited)
Would a 14 inch return be enough for a 2&1/2 ton unit? How cfm does a 2&1/2 require? I was told that 14 inch return was good for about 800cfm and that you need at least 400 per ton, if that is true then I would need another return. Any help on size would be great. (house is 1,250 sq ft)
 
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