Our products are fully tested and certified by the National Fenestration Rating Council (NFRC) and meet all Energy Star requirements off all four zones (Northern, North-Central, South-Central and Southern).
Energy Star is managed by the U.S. Department of Energy and Environmental Protection Agency. The program provides certifications to consumer products, such as windows and doors that meet certain requirements of energy efficiency.
*All ViWinTech windows and doors meet Energy Star requirements when using the proper configuration of glass. We reserve the right to change the products and/or specifications at any time without notice. ViWinTech assumes no responsibility for use of outdated printed matter.