Windows can be one of your home’s most attractive features. Windows provide views, day lighting, ventilation, and solar heating in the winter. Unfortunately, they can also account for 10% to 25% of your heating bill.

During the summer, your air conditioner must work harder to cool hot air from sunny windows. 

Install ENERGY STAR windows and use curtains and shade to give your air conditioner and energy bill a break.

Look into low-e windows, which can cut the cooling load by 10% to 15%.

If your home has single-pane windows, consider replacing them with new double-pane windows with high-performance glass.

The 2 main objectives in the summer are to keep the sun out of the room  in order to keep it cool.