Low SGHC windows in a heating climate?
The equivalent of low solar heat gain is high infrared reflectance. In the winter season, given that 1. there’s more heat (infrared) inside the house, and 2. there are more hours of dark than daylight, and 3. the heating contractor has to keep you comfortable every hour (not just the seasonal average), does it make sense to have a window that reflects more heat at you in winter? Similar benefit in summer when you’re trying to keep it cool inside.
I live in Iowa where temperature extremes range from -10°F to +100°F, and am fond of using Andersen’s Smart Sun Low-E, SHGC of about 0.20 and Visible Transmittance of about 0.50.
Would that glazing be more comfortable and help the HVAC contractor use a smaller heat source?
Anyone else with experience or calculations?
Don Otto, [email protected]
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