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Would a 14 inch return be ok for a 2&1/2 ton ac with a 3ton drive furnace, or would I need to adjust the furnace?
 

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Would 16" be better?? The reason I asked is because I increased my return from a 14x24 to a 16x 25, less noise and more air movement. seem to help, any opinions? Mine was a 2 ton unit.
 
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