Sources of Summer Heat*
Windows on a typical home in the Phoenix area account for nearly 50% of the workload placed on you air conditioning system. That’s more than the roof, walls, and attic combined! Untreated windows in the desert environment will allow about 20 times more heat into your home than an equal amount of insulated wall space. By controlling the way the sun’s energy enters your home, you can save on summer energy bills and take advantage of “free” heating in the winter.
* Source: APS