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Adding Energy Efficient Windows In Phoenix Makes A Huge Improvement
In environments such as southern and central Arizona, including Phoenix, replacement windows can make a noticeable improvement in the comfort level of your home and in your utility bills. Together with the benefits associated with energy and money savings, energy efficient replacement windows also improve the appearance of a home, make it quieter, permit less dust to come in a house, protect the interior (carpet, rugs, floors, furniture, window coverings, art, pictures) against fading caused by ultraviolet light, let more light in and cut down on condensation on the windows.
Window Ratings
With in excess of 300 days of sunshine in a year, how well a window restricts the heat and ultraviolet rays from the sun is very important. Energy Star windows are rated in 5 categories. The U-Factor and the Solar Heat Gain Coefficient show how much heat a window transfers and are the key ratings to emphasis on when buying replacement windows for a Phoenix home.
Solar Heat Gain
Solar heat gain is the volume of the sun's energy that is transmitted through a window. The sun's heat is passed through the glass in addition to the window frame and sash. The frame and sash can comprise 10-30% of the total area of a window so the frame construction is an important determinant. Windows use a variety of techniques to minimize solar gain.
Low-E Coatings
Low-E coatings limit the heat and ultraviolet rays passing through a window. Low-E coatings are exceptionally thin, invisible metal layers attached to the glass. High, medium and low solar gain variations of Low-E coatings are available. To further inhibit solar gain, some double pane windows include Low-E coatings on both pieces of glass.
Gas Fillings
The gap between the panes of glass in double pane windows can be filled with gas (Argon gas or Krypton gas). This gap can be filled air or gas (Argon gas or Krypton gas). The gasses are heavier than air and make it tougher for hot or cold air to pass between the panes. Krypton is the heavier of the two gasses and requires a smaller space between the panes but is more expensive. The gasses are non-toxic so there is no health risk if a window is damaged.
Window Frames
Vinyl windows frames have hollow spaces inside which can be filled with insulation to improve their thermal performance. Aluminum transmits heat very efficiently so aluminum windows have poor thermal performance unless a thermal break is added. A material which transmits heat very poorly is positioned between the aluminum pieces on the inside and exterior of the window to form a thermal break.
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