Hello,
We were given a copy of a Manual J from our builder. The numbers seem very low as far as equipment size. We have 1525 sq ft upstairs and 1425 in our walkout basement. They said we needed 23,250 btu required and 28,400 btu recommended total. We also had 42,000 recomended on heat. They installed a 2.5 ton Heat pump. I realize they are sized for cooling, but expecting us to make up the 12,ooo btu needed from electric heat is to costly.
Another concern is 1025 total cfm required for the entire house. Do these numbers sound reasonable or did Mr. builder go with the lowest HVAC estimate.