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Home/Construction/HVAC/Heat Gain Calculator
Construction CalculatorHVAC

Heat Gain Calculator

Calculate the solar heat gain through windows based on window area, solar heat gain coefficient (SHGC), and shading conditions.

Updated 2025-01-153 min readCalzyra Construction Team

Calculator

Enter your values below

Formula & Methodology

How this calculator works

Heat Gain (BTU/hr) = Window Area × SHGC × Solar Intensity × Shading Factor

Solar heat gain is calculated by multiplying the window area by the solar heat gain coefficient, the solar radiation intensity (typically 200-250 BTU/hr/ft²), and a shading reduction factor based on external shading.

Frequently Asked Questions

Common questions about this calculator

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