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I haven't.
Have you tried HVAC Calc.

Its pretty quick. Based off of Manual J. And available in both a residential and commercial version.
 

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Manual J a must !!!

:thumbsup:
Looking for a nice and simlpe Man J software.

What do you use and why?

Has anyone used Fast-Calc?

Here is a link http://www.fast-calc.com/index.html
:thumbsup:
I've tried the quick calc. It dosen't come close to manual J! It's better than the rule of thumb. I only recommend ACCA manual J I've done a lot works great for me and the home owner. Try Wright J,S,D and T WOW!! Comfort Great!!
 
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