HVAC-Calc, the Heat Loss and Heat Gain Calculator
For Sizing Furnaces and Air Conditioners.
Easy to use and Fast too!

Residential Heat Loss and Heat Gain Calculation
Manual J Software

Only $389
home-owner special

Only $49 for your own house


Sales AND Support
10:00 a.m. to 8:00 p.m. 7 days/week

HVAC-Calc Commercial 4.0
regularly $489
Limited Time Only
($289 with purchase
of Residential program)

To learn more, then download free trial