Important! Rocky Mountain Power’s wattsmart Starter Kit will no longer be available effective August 5, 2016. For questions or additional clarification, please email HES@rockymountainpower.net.

Solar Heat Gain Coefficient (SHGC)

Solar Heat Gain Coefficient is the fraction of solar radiation admitted through a window. This tells you how well the product blocks heat caused from the sun. The lower SHGC, the less solar heat it admits into your home.

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