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.
