ASolar Heat Gain Coefficient (SHGC) measures how well a window blocks heat from entering a home or building, whether directly transmitted or absorbed and subsequently released inward. SHGC is expressed as a number between zero and one. The lower the SHGC, the better a product is at blocking unwanted heat gain. Blocking solar heat gain is particularly important for homes located in warm, southern climates and during the summer cooling season.
ASound Transmission Class (STC) is a single-number system used to rate the airborne sound transmission performance of a window, wall, panel, ceiling, etc. The higher the STC number, the better the product's ability to block sound transmission.
The National Fenestration Rating Council is a non-profit organization that developed the uniform rating system used to measure the energy performance of fenestration products. These ratings are standard for all products, regardless of the material they are made of. Topbright product comes with the NFRC label.
The American Architectural Manufacturers Association is a trade association that advocates for manufacturers and professionals in the fenestration industry. Topbright product passed The AAMA test, you can check the Test report.
