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Windows

Window Solar Heat Gain (SHGC) Calculator

Cooling load from glazing SHGC, area, and sun exposure.

Glass areasq ft

SHGC

0.2–0.7 typical

Sun hours / dayhrs

AC COP

Added cooling load

Enter area, SHGC & sun hrs

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About Window Solar Heat Gain (SHGC) Calculator

SHGC effect

Lower SHGC blocks more solar gain—critical on west facades. Model scales with glass area and sunny hours.

Frequently asked questions

Q: Low-E vs tint? A: Compare SHGC and VT ratings on NFRC labels.

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