Why Low-E Windows?
Low-emittance (Low-E) coating has become a must-have for colder climates. Low-E coated windows have a type of diffused glass where microscopic metal is layered onto the glass to suppress radiant heat transfer. This basically means that the coating is placed to allow in solar heat while preventing it from escaping (which makes its use in warmer climates not advised, of course). Low-E comes in many variations, but Low-, Moderate-, and High-Solar Gain window treatments are the distinctions most often used. The lower the solar gain, the better the window is for colder climates. Other variations of Low-E include the even more efficient Heat Mirror and its double-treated big brother Superglass. Each of these glazing systems carries an added cost, so it is important to know which best fits your specific climate. Making the choice As always, you will be considering these window treatment choices in conjunction with price. It is important, then, to look at the various ratings posted on each win
