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.