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.

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