Originally posted by swampfox
I just did a very complex and costly Manual J last night on the computer in about 20 minutes
I get your point. But one thing you pros haven't mentioned is who's going to pay for these calculations.... Manual J, D, and anything else that might be recommended? If you guys are willing to do them gratis, along with your free estimates, that's great. You can do all the free calculations you want. But I think that very few home owners--including me--would be willing to pay $ hundreds up front, just to determine A/C unit and duct size. ~rick