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Gord,

Thanks for you tip regarding the "change all" tool. Sounds like I need to at least pop for the $39 version so I can do some more serious playing with it. I did like the way the interface...

I recently downloaded the trial version of hvac-calc to test on a house I'm planning to build with ICF type walls so I set it up in the program with ICF walls. Since I was curious how much the...