HVAC Load Calculator
Determine the total heating and cooling load for a building (Manual J).
How to use this calculator
A simplified "Manual J" calculation to determine the heating and cooling load for your entire home. This is essential for correctly sizing a new central HVAC system.
Suggestions & Feedback
Have an idea for a new calculator or found an issue? Your feedback helps us a lot in making this tool better for everyone. Please consider submitting your thoughts on our GitHub repository.