gotsunscreens.com
Got Sunscreens?The US. Dept. of Energy says in its 1994 study, that shading the outside exposed windows or doors is the best way to stop heat build up. The Energy Efficiency and Renewable Energy Clearinghouse says that roughly 40% of heat build-up and heat loss is through windows and doors. External shading is the most effective home treatment to counter these effects. Shading the exposed windows and doors can reduce temperatures by as much as 20 degrees. Save Dollars and Cut Utility Bills!
http://www.gotsunscreens.com/