HVAC Load Calculator

Whole House Block Load

: On your old PC, go to Settings > System > Activation . Ensure it says "Windows is activated with a digital license linked to your Microsoft account".

"The product key is blocked."

Disclaimer:Use this online load calculation program at your own risk.
This program has not been accredited by any organization and though much time
and effort has been spent to make it accurate there is no guarantee to its accuracy.