- Double-glazed windows are formed by fastening two panes of glass together with air between them.
- Energy-efficient windows can be tailored to your environment to stabilize a building's environment and help reduce heating and cooling bills. In addition to their energy-cost savings, double-glazed windows can also help reduce incoming neighborhood noise.
- Energy-efficient double-glazed windows are rated for their ability to insulate heat and cool using the U-factor, a measure of the material's tendency to lose heat, along with the solar heat gain coefficient (SHCG), a measure of a window's tendency to absorb heat from sunlight, and the window's visual transmittance (VT), or how much light the window lets through.
- Types of double-glazing include aluminum, wood, vinyl, fiberglass, insulated vinyl and hybrid and composite.
- According to "The Efficient Window Collaborative," frame choice can greatly affect the performance of double-glazed windows.
- For buildings in a warm environment that need to be protected from a hot sun, fiberglass and insulated vinyl-type window glazing offers the best protection from solar warmth and heat transfer. For cooler climates looking to maximize sun warmth and minimize heat loss, wood and vinyl are the best types of double glazing for windows.
