Solar Heat Gain Calculator
Calculate solar heat gain through windows based on SHGC, orientation, latitude, and shading to estimate cooling load impact.
Inputs
sq ft
°
Results
Peak Solar Gain
1,500 BTU/hr
Annual Heat Gain
3,000,000 BTU
Cooling Load1,500 BTU/hr
Shading Reduction75%
How to Use This Calculator
- Enter the total Window Area in sq ft for the facade being analyzed.
- Enter the SHGC (Solar Heat Gain Coefficient) from the window label (0 = no gain, 1 = full gain).
- Select the Orientation (north, south, east, or west) and enter your Latitude.
- Enter the Shading Coefficient to account for overhangs, fins, or blinds reducing solar exposure.
- Review Peak Solar Gain and Cooling Load Contribution in BTU/hr and Annual Heat Gain in BTU.
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