A requirement for any architect, HVAC Engineer, Home Performance Contractor, or Building Scientist. Rhvac makes heating and cooling load calculation and duct sizing as easy as they can be - with one-click help on virtually every input, favorite material lists, automatic error checking and more. Try it today and see if it isn't the most user-friendly and powerful load calculation and duct sizing program you can get.

This is one of two programs approved by ASHRAE to perform manual J load calculations. It is easy to use and comes with everything you need including a drawing board. The only drawback is that it does not include an unlocker for the Manual D Ductsize portion of this program. Please note that Elite's Ductsize 6 is only for commercial buildings. Therefore, the Manual D Ductsize portion is a necessity. If you have a keygen or crack for the Manual D Ductsize portion, please post it and save some starving students!
Install Info
Unzip, unrar and install the application.
Use our keymaker to generate your personalized license file, then load it into Rhvac to register program by going to [help/about/copy licence file] then select the generated file from keymaker.exe

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