What Are Low-E Glass Windows?
Homeowners everywhere are looking for ways to increase their home’s energy efficiency—not only in the interest of eco-friendliness but also with the hope of saving money. If you’re in the market for new windows, you may have encountered the term “low-E.” If you’re unfamiliar with this rating and its implications, the window experts at Shepard's Glass of Kalispell, MT, can provide some insight to help you make the best choice for your next glass purchase.
What Does “Low-E” Mean?
The sun emits several types of light—UV, infrared, and visible light, all of which manifest as unique wavelengths. Infrared light has the longest wavelength, and it becomes heat inside a windowed structure. While visible light sits right in the center, UV light has the shortest wavelength, and it causes upholstery to lose its color over time.
Certain windows are covered with UV coatings, which limit the amount of infrared and UV light that can pass through glass. However, because of the difference in wavelengths, visible light passage is not affected. Since emissivity is the measure of how a surface releases energy as thermal radiation, or heat, low-emissivity (low-E) windows minimize the amount of heat that is let into the house.
How Do Low-E Windows Work?
Low-emissivity windows are covered with an incredibly thin coating that reflects infrared waves from the sun—the ones we feel as heat. When indoor heat tries to escape in the winter, it also reflects those infrared waves back inside. With less heat loss in the winter as well as decreased heat passage in the summer, low-E windows significantly raise the energy efficiency of homes. As a result, you can save money on heating and cooling bills throughout the year and lower your carbon footprint.
If you’re interested in installing low-E windows in your home, get in touch with Shepard’s Glass today. In addition to installing these eco-friendly exterior panes, they also offer shower doors and storefront repair. For more information on their products and services, visit the website or call (406) 755-4540.
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