What can you do about it?

Adding trees, awnings, lattices, or vines to shade exposed areas of your business' exterior will help reduce your cooling load (the energy required to keep a building cool).

Use curtains, window film, and landscaping to shade windows during the summer.

Focus on shading east, west, and south facing walls. 



Install window screens.

Coupled with shade from landscaping, window screens can maximize shade potential from your home. Use screens with a shading coefficient of .76 or lower to reduce heat radiation.

Add awnings and overhangs to windows.

Awnings and overhangs should be close to the top of windows to effectively shade the glass. A good rule of thumb is to cover half the surface of glass at the summer solstice (e.g. A 30" overhang at the header will cover the top half of a 4' tall window). 

Place trees appropriately to optimize solar gain.

Plant evergreen trees on the west and east sides of the building to keep out heat all year long. Use deciduous trees on the south because during the winter, after dropping their leaves, the branches will filter the sun and provide desirable partial passive heating. 

If you're doing new construction, there are even more passive design features that will help decrease your energy usage.  Click here to learn more.  

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under the auspices of the California Public Utilities Commission.

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