How can I determine the energy efficiency and durability of Shwinco Windows or any other window?
The American Architectural Manufacturing Association (AAMA) and the National Fenestration Rating Council (NFRC), test the performance and quality standards for windows. The NFRC established standards for thermal performance. • U-factor: This is a measure of heat loss. The lower the U-factor the better. • SHGC (Solar Heat Gain Coefficient): Once again the lower the better. • VT (Visible Transmittance): The higher the visible transmittance, the more daylight is transmitted. A high VT is desirable to maximize the amount of daylight entering the home.
