HVAC-Calc, the easy to use Heat Loss and Heat Gain Calculator, residential and commercial.

If you are looking for Heat Loss & Heat Gain software that's easy to use ...

You found it!

Residential loads for contractors ...

  • HVAC-Calc Residential 4.0
  • "Finally! A Manual-J program that is a snap to use. I love it!"
  • Only $389 for full version

Residential loads for home-owners ...

  • HVAC-Calc Residential 4.0
  • Size furnaces, air conditioners or heat pumps, instructions included
  • "If you can measure with a tape measure, you can use your program."
  • Only $49 for your own house


Commercial Loads for contractors ...

  • HVAC-Calc Commercial 4.0
  • Incredibly fast and easy commercial loads
  • Only $389 for full version

Get Both!

  • Save $100.00 !


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

Unlimited toll free support - Included!
12 months free upgrades - Included!
Payment plan, spread over 4 months, no extra charge - Included!

To learn more, then download free trial