Energy Conservation tips for your Windows
If you live in a Cold Climate:
- Install exterior or interior storm windows; storm windows can reduce heat loss
through your windows by 25% to 50%. Storm windows should have weatherstripping
at all moveable joints; be made of strong, durable materials; and have
interlocking or overlapping joints. Low-e storm windows save even more energy. - Repair and weatherize your current storm windows, if necessary.
- You can save 10% or more on your energy bill just by reducing the air leaks in
your home. - Install tight-fitting, insulating window shades on windows that feel drafty
after weatherizing. - Close your curtains and shades at night; open them during the day.
- Keep windows on the south side of your house clean to maximize solar gain.
If you live in a Warm Climate:
- Install white window shades, drapes, or blinds to reflect heat away from the
house. - Close curtains on south- and west-facing windows during the day.
- Install awnings on south- and west-facing windows.
- Apply sun-control or other reflective films on south-facing windows.
Tips when shopping for windows
- When you’re shopping for new windows, look for the National Fenestration Rating
Council (NFRC) label; it means that the windows are performance certified. - Remember, the lower the U-value, the better the insulation. In colder climates,
a U-value of 0.35 or below is recommended. These windows have at least double
glazing and low-e coating. - In warm climates, where summertime heat gain is the main concern, look for
windows with double glazing and spectrally selective coatings that reduce heat
gain. - Select windows with air leakage ratings of 0.3 cubic feet per minute or less.
- In temperate climates with both heating and cooling seasons, select windows
with both low U-values and low solar heat gain coefficiency (SHGC) to maximize
energy benefits. - Look for the ENERGY STAR® and EnergyGuide labels.
