Double Hung windows with Warm Edge insulating glass, Low-E glass and Argon gas have a U-Value of 0.30 which is the lowest ENERGY STAR® requirement. In choosing Regal Windows you can be assured that you have chosen a product that will save energy on your heating and cooling costs. You can also be assured that American windows will fit your lifestyle, beautify you home and increase your comfort level.
All American windows have the NFRC label to insure that they have been independently tested and certified to meet your energy needs and qualify for the ENERGY STAR® program. The National Fenestration Rating Council (NFRC) is a non-profit, public-private organization created by the window, door, and skylight industry. It has established a voluntary national energy performance rating and labeling system. All American Window’s windows meet NFRC rating guidelines.
The American Architectural Manufacturing Association (AAMA) is a voluntary organization that establishes material performance standards for the window industry. Our windows meet or exceed the AAMA guidelines. As you can see, our windows and doors meet or exceed demanding rating requirements, providing a lifetime of top-quality, performance and efficiency.