San Francisco County, California

Home Building Efficiency Report

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US Climate Zone Map
3C –

San Francisco County, California is located within the climate zone, which also has the designation of #3C. The US Department of Energy has split the United States into eight zones to help in creating optimal building practices to achieve the most energy savings within homes.

Best Energy Saving Products

We've outlined a handful of building products that should be tailored for homes specifically in your California county. We detail the recommendations, how to interpret them, and then some of the more popular brands that meet or exceed those energy-saving standards.

Windows in San Francisco County are expected to have a U-Factor of or less. The lower the U-Factor value of a window, the better it is at keeping heat inside the home.

The expected Solar Heat Gain Coefficient (SHGC) of windows installed in San Francisco County should be equal to or less than . This value measures how well a product can resist unwanted solar heat gain, which is important in the warmer summer months.

Climate Zone Window U-Factor Skylight U-Factor Glazed SHGC Air Leakage
3C –

Any new or replacement window will be better at preserving energy than an old leaky one. Double paned windows with argon gas are the most energy efficient, but also the most expensive.

Manufacturer Product Type Material Installation Price U-Factor* SHGC*

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* Each product has various options that impact energy performance.