When it comes to energy efficiency, climate plays a big role. That’s why the experts at ENERGY STAR have divided the country into four different zones, based on variables like climate, temperature fluctuations, humidity, and rainfall. That way, you can be sure you’re buying exterior home products like windows and doors that are rated for your specific climate zone. So whether you live in a warm climate or a cold one, you can rest assured that your ENERGY STAR-rated products will help save you money on your energy bill.
The ENERGY STAR label is a federally regulated symbol that displays a product’s efficiency in using energy. The label is most commonly seen on appliances and electronics, but can also be applied to homes and buildings. For homes, ENERGY STAR evaluates window performance through various ratings, all of which are based on the U-Factor.The U-Factor, or the rate of heat transfer, is just one of the ways in which ENERGY STAR rates windows. Other methods include the solar heat gain coefficient (SHGC), air leakage, visible transmittance, and condensation resistance. According to ENERGY STAR guidelines, the U-Value of a window can range from .25 to 1.25. The lower the U-Value, the more energy-efficient your window is. If your home’s windows face the sun, installing replacement windows with a lower U-Value is even more important. Replacing old, inefficient windows with ENERGY STAR certified ones can help you save money on your energy bills and make your home more comfortable throughout the year.
The ENERGY STAR certification makes life easier when you want to buy something for your home. When it comes to interior and exterior home remodeling, ENERGY STAR doors and windows assure you of five things: lower energy bills, energy reduction and GHG emissions, better comfort with fewer drafts and more consistent temperatures, protection from UV damage, and peace of mind from a certified product. Not only will you save money on your utility bills, but you can take pride in knowing your home improvement project is helping the environment. To learn more about ENERGY STAR doors and windows or find a retailer, visit www.energystar.gov/windows.