What are ENERGY STAR® Windows?

ENERGY STAR certified windows are certified by an independent accredited agency for energy performance and insulating glass durability. These certified products often have longer warranties than conventional products. Products that are certified for the zone in which you live—or colder—are the best energy performers of all makes and models on the mainstream market. They meet strict technical specifications for high efficiency—without compromising features or performance in other areas. In fact, ENERGY STAR® certified windows, doors and skylights can decrease your energy costs by about 6% saving you about $75 a year.