Surprisingly in Arizona, it is the windows that account for the most heat gain in homes… not your attic or leaky ductwork. The windows are always a weak spot no matter if you have 4 panes of glass filled with argon gas, it is still transparent glass. Many homeowners also do not know that sun screens are still effective on low-e windows. A low-e coating helps to block the radiant heat, but not the conductive and convective heat. A sun screen will help block the convective and conductive heat, up to 90% of solar heat gain.
Both APS and SRP have great rebate programs for installing shade screens. APS will pay $1 per sq ft up to $250 for installing sun screens on all east, west and south facing windows. SRP will pay $0.80 per sq ft up to 250 for installing sun screens on all east, west and south facing windows. Both APS and SRP rebates on shade screens are including in the home energy audit program too.
So you can beat the heat this summer by having shade screens installed on your home!