Welcome! Here are the website rules, as well as some tips for using this forum.
If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Looking for heat gain calculators
Why not just take your the numbers to your supply house, or better yet have them come to the site. We do about ten aweek for our contractors.Most good supply houses will offer this service. Software can cost $1000's,which unless you do a lot of installs payback could take along time. Many of our contractors like the fact that they can be working on making money while we do the losses/gains for them.