The label doesn’t lie. Every replacement window unit should come with a detailed NFRC (National Fenestration Registration Council) label. The Solar Heat Gain Coefficient will tell you how effective the low-e coating is at blocking unwanted heat gain in summer and reflecting indoor heat in winter.
Most of us have heard about "low-e glass," which is used in both new and replacement windows. Low-e technology has been used on windows since the mid-1970s, and every major window and door manufacturer offers low-e glass on their products.
If you're in the market for replacement windows or exterior doors that contain insulated glass, it's smart to get up to speed on how low-emissivity films work, what the difference is between "hard-coat" and "soft-coat" versions, and how to make sure your new glass qualifies for different rebate programs.
Contact us today to schedule your free estimate for energy efficient windows in Silver Spring, Hyattsville, Gaithersburg, Rockville, Annapolis, Bowie, Bethesda, Upper Marlboro, Waldorf, Laurel, and the surrounding areas!
The "e" in low-e stands for emissivity —the ability to emit radiant energy. A dark asphalt driveway has a high e-factor; it will absorb and emit a great deal of heat. A low-e coating emits almost no radiant energy. The coating is actually an invisible metal or metallic oxide film that's deposited on the surface of the glass during or after the manufacturing process. This microscopic layer allows light (short-wave energy) to penetrate the glass, but blocks most ultraviolet (UV) long-wave energy, which we feel as heat. Here's how low-e windows improve energy efficiency during summer and winter months:
Call 1-855-432-5006 or contact us online to schedule a free home inspection and Low-e glass window estimate. We also offer a comprehensive home energy audit.