What Makes a Window Energy Efficient?

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When shopping for replacement windows in Phoenix, one of the key features you’ll want to look for is energy efficiency. Efficient windows will keep your home more comfortable as well as reduce your utility bills. According to the EPA, heat gain and heat loss are responsible for 25-30 percent of your heating and cooling costs.

While most homeowners are aware of the importance of energy efficient windows, most don’t know what to look for. So what exactly makes a window efficient? Let’s explore!

Frame Construction

The foundation of the window is its frame. Window frames are made from a variety of materials, and these materials can have an impact on the window’s ability to retain energy. For example, vinyl offers more insulation than wood. Some of the most common materials for window frames include vinyl, fiberglass, aluminum and composite.

Glass Panes

Even though windows will lose heat through the glass, they can be engineered to prevent heat transfer. While single pane windows are economical, they are not ideal in terms of efficiency because they don’t offer much insulation. Instead, it’s best to choose dual or triple pane windows. Multiple panes of glass block heat transfer and provide insulation, resistance and soundproofing.

Low-E Glass Coating

Another term you’ll hear a lot when shopping for replacement windows in Arizona is Low-E glass. This type of glass has a Low-E coating to reflect infrared light and ultraviolet light. This prevents outside heat from entering your home, as well as protects interior furniture from fading and sun damage.

Warm Edge Spacers

Warm edge spacers are used to create distance between the panes of glass. They also insulate the window and reduce heat transfer. Look for energy efficient windows that feature the latest warm edge spacer technologies.

Gas Fills

Window manufacturers use gas fills to displace the air between the panels. This gas is colorless, odorless and nontoxic. It has the purpose of insulating a room and minimizing the transfer of heat through the window panes.


Most windows have weatherstripping along the edges of the window, and this material is responsible for keeping drafts out. Generally speaking, the more weatherstripping you can get on the windows, the better. This should also be replaced every few years.

When you finally decide what types of windows you want installed in your home, be sure to choose a qualified and reputable window installation company in Arizona. Your windows will only be as reliable as the installation itself! For a free estimate on replacement windows, contact Greco Roman Construction and Design today.