Energy efficiency is fast becoming an essential feature of replacement windows because of its many benefits. In today’s post, Renewal by Andersen® of Phoenix takes a look at what makes windows energy-efficient by answering these frequently asked questions about windows and energy efficiency.
How Does Insulated Glass Work?
Much of a replacement window’s energy performance depends on insulated glass. The term “insulated glass” is a misnomer when you consider that it does not have conventional forms of insulation like foam or fiberglass. Instead, insulated glass has two glass panels that enclose a sealed airspace. Without air molecules to conduct heat between the interior and exterior sides, it slows down thermal transfer and acts as an insulating layer.
What Are Insulating Gas Fills?
Window replacement companies, including Renewal by Andersen, offer an optional insulating gas fill that enhances insulation in insulated glass. During manufacture, the airspace described above is filled with an inert gas – typically a blend of argon and krypton – that slows down thermal transfer even more. A typical follow-up question is “is it dangerous?” and the answer is no. These inert gasses are odorless, colorless and nontoxic, making modern replacement windows perfectly safe for your home.
What Is “Low-E”?
“Low-E” means low-emittance or emissivity. It is used to describe window glass that’s treated with special coatings that allows it to selectively block UV radiation and heat from the sun, all this while letting visible light through as if it’s clear glass. With Low-E glass, you can let direct sunlight shine through your windows without worrying about heating up the room or damaging fabrics. Low-E glass is a standard feature of our High Performance™ Low-E4® glass.
What Is U-Factor?
U-factor or U-value is a key energy rating in replacement windows, entry doors and skylights. It measures insulation and is found on the energy ratings labels affixed on new windows. A window with a low U-factor means it has better insulation. In other literature, R-value may be used instead of U-factor. While both measure a window’s insulation, R-value measures resistance — a window with a low U-factor will therefore have a correspondingly high R-value.
Renewal by Andersen of Phoenix provides window replacement services to Phoenix, AZ, and the surrounding communities. Give us a call at (602) 772-5059 or fill out our contact form to schedule an appointment.