You can choose window treatments or coverings not only for decoration but also for saving energy. Some carefully selected window treatments can reduce heat loss in the winter and heat gain in the summer. They include the following:

• Awnings
• Blinds
• Draperies
• High-reflectivity films
• Insulated panels
• Mesh window screens
• Overhangs
• Shades
• Shutters
• Storm panels.

Window treatments, however, aren't effective at reducing air leakage or infiltration. You need to caulk and weatherstrip around windows to reduce air leakage.

- www.energysavers.gov