Got a duct question, I’ve always done commercial service but there was a debate in my office the other day about residential duct design, the house is a 3.5 ton heat pump with (2) 10’s and (1) 12 for the return I was told that was correct but it seems small to me, I suggested min of (2) 12’s and (1) 10 or make all (3) 12’s on an existing unit that’s all flex duct Any advice is appreciated

Posted by waynelamurey at 2021-05-08 12:25:24 UTC