Energy-efficient windows aren’t only better for the environment but also for your home. These windows can help keep your interior at a comfortable temperature without needing to depend as much on your HVAC system. The less energy you consume heating and cooling your home, the more savings you’ll enjoy.

Read on as a leading window replacement company answers commonly asked questions about energy-efficient windows.
What Is a Low-Emissivity Glass?
Low-emissivity (Low-E) glass contains a special coating that blocks ultraviolet light. This type of glass can improve a window’s thermal efficiency, reduce glare and prevent harmful UV rays from entering your home. Windows with Low-E glass are ideals for areas with a warm climate or experience long summer days.
At Renewal by Andersen® of Phoenix, our High Performance™ Low-E4® glass is 56 percent more energy-efficient in summer and 45 percent more energy-efficient in winter compared to standard-dual pane glass. Meanwhile, our High Performance™ Low-E4® SmartSun™ glass is 70 percent more energy-efficient in summer and 45 percent more energy-efficient in summer.
What Is Insulated Glass?
Insulated glass refers to a window with at least two panes of glass separated by insulation at the edges. It is also filled with air or gas in the middle for improved thermal efficiency. For instance, a casement window with an argon or krypton gas fill has greater thermal value or can provide better insulation.
Is R-Value Different from U-Value?
R-value usually pertains to wall and ceiling insulation value. The higher the R-value, the more insulated walls and ceilings are. However, it doesn’t apply to fenestration products, such as windows. When it comes to windows, the term U-value is used instead. Windows with a lower U-value work better at preventing outdoor temperatures from affecting your interior.
Choose Renewal by Andersen of Phoenix for your window replacement project. We install casement, double-hung, gliding windows and more. Call us at (602) 772-5059 or fill out our online form to schedule a free in-home consultation. We work with homeowners in Scottsdale and Tempe, AZ, and areas around Arizona.