Have any of you guys been using the Rheem Designstar software for Heat Loss and Heat Gain Calculation? How is it and how accurate is the calculation? Is the calculation accepted well at your local building code offices? I am doing some research for my uncle who is a mechanical contractor in south florida. Another option my instructor at school told me is the software by Wrightsoft Right-J. I have also seen and used before hvac-calc 4.0. The county building code offices are really tighten up the belt when pulling permits. They require now a load calculation which they didn't do before. LOL, its a bit hard for my uncle to chew and swallow as he was old school and would always say 400sqt per ton. LOLLLL

Any feedback would be appreciated