Low-E (low-emissivity) is specialized glass that works like a thermal mirror, keeping heat inside during winter and reflecting solar heat away during summer while maintaining excellent visibility. When paired with high-performance uPVC frames, it offers an ideal solution for homeowners needing higher energy efficiency standards, such as those required for passive houses. If you [...] The post How does Low-E glass enhance uPVC window performance? appeared first on Oknoplast USA.