HVAC Heat Load Estimator
Quick Manual J style estimates.
Building Specs
Estimated Load
This is a simplified estimate based on general rules of thumb. For precise sizing, a full Manual J calculation is recommended, which accounts for exact orientation, shading, duct leakage, and local weather data.
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HVAC Heat Load Estimator for HVAC estimators
HVAC Heat Load Estimator helps HVAC estimators rough-size equipment early. Enter square footage and design assumptions and get estimated heating and cooling load you can use immediately in your bid or project file.
Used by contractors across California, Texas, Florida, New York, and Illinois, with active users in Los Angeles, Houston, Dallas, Chicago, Phoenix, Atlanta, Seattle, and Denver.
Quick answer: what does this tool do?
Estimate heating and cooling loads quickly for early planning.
How should I apply the results?
Use loads to select equipment ranges and budget.
Is this suitable for public bids?
Yes. The inputs align with typical DOT, municipal, and federal bid requirements.
What keywords does this tool target?
hvac load calculator, manual j calculator, heat load estimator
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