Many Northern Virginia   homeowner   might want to know what is low E glass when buying a thermal vinyl   window from a contractor.  Low E glass works by reflecting heat away from your window. Low E glass works by using   a very   thin metallic coating on  the glass of a thermal replacement window. Low E glass windows and doors help keep your home cool in the summer and warm in the winter because these metallic coatings have   an   ability to   insulate your home from heat and cold.
PHOENIX GLASS R VALUES IN NORTHERN VIRGINIA

Window and doors are not rated by a “R” rating,   the R stands for resentence to heat or cold.     Windows and door are rated by a “U” factor. The U-factor measures how well a door or window keeps heat from escaping. The lower the U factor the better a door or windows resistance to heat loss. Many factor make up the rating of your window or door system’s “U” factor. One way to lower the U factor in a thermal window  or door’s glass is to insert argon gas within the thermal glass. Argon gas  windows  are about  6% more energy efficient than windows manufactured without  argon gas. Argon gas is a less conductive gas than dead air, or CO2 and will lower the U factor of your new window system. The combination  of low E and argon gas will help your window and door system obtain the Energy Star rating that will get you a tax credit. Most of the door and window systems installed by Phoenix Home Services meet the Energy Star ratings of 0.30 or less. Phoenix Home Services is a contractor that installs windows and door in Northern Virginia including the Counties of Fairfax, Arlington, Alexandria, Loudoun County, and Prince William Va.