rhvacElite’s Residential/Light Commercial Load Calculation Software



RHVAC quickly and accurately calculates peak heating and cooling loads for residential and small commercial buildings in accordance with ACCA Manual J 8th edition.RHVAC: includes

  • all the building materials,  HTM and U-values from Manual J tables, allowing the user to quickly specify the building’s  construction material.
  • an editable weather database of over 1500 cities.
  • equipment databases from over 250 HVAC manufacturers that can be downloaded for equipment selection.
  • duct sizing function in accordance with Manual D.

RHVAC screenClick here or on the picture to the right to view a brief (7 min) instruction from our training video, Hit the Load, J.

A single licensed copy can be installed in multiple computers with no extra fee. Regular updates are also free. There is no annual licensing fee.

Need a personal run through? For information on a Join.me overview and to request a meeting…

RHVAC’s  works as a stand alone. Additional functions available with several add-on programs:


RHVAC Version 9 includes Tabular which allows you to complete a Manual D duct system analysis and include every duct section and fitting in the project. 

Learn how to use the new Tabular function in RHVAC9. Click here for a brief overview from our DVD Tabular. Click here or on the picture.




Bundle RHVAC, Drawing Board, Manual D Ductsize for only $899 (reduced price). Click to to use the PayPal Easy Payment plan – 6 Month interest free.

TftT’s instruction book, Hit the Load, J, and jump start DVD available.

Book – $95 (click for details)

DVD – $85 (click for details)**

** DVD includes an option for  Spanish subtitles.

Book and DVD combo package – $125


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