You’ve probably heard the term “SHGC” when shopping for new windows. Short for solar heat gain coefficient, it is best described as a ratio where 0 is equal to the least amount of solar heat allowed through a window, with 1 being the maximum.
But you might be wondering to yourself, “What’s the ideal SHGC rating, then?”
There’s no set SHGC rating that’s considered ideal. This will all depend on the climate where you live. Consider the following when choosing replacement windows for your home:
In San Francisco, where the yearly weather conditions range from mild winters to dry summers, the recommended SHGC rating is 0.40 or less. As for the other energy performance ratings, the recommended U-factor, which is the rate at which a window transmits non-solar heat flow, is 0.30 or less.
As a leading window contractor in the area, Renewal by Andersen® of San Francisco offers ENERGY STAR®-certified replacement windows that provide remarkable energy efficiency. Call us now at (510) 263-3210, or fill out our contact form to talk to one of our design consultants today to discuss your window replacement needs. We serve clients in and around San Francisco.