What Makes Windows Energy Efficient?


Whether you’re in the market for new windows or you’re simply interested in testing the windows you already have, it’s important to have a bit of know-how when it comes to energy efficiency. What exactly makes a window more energy efficient? When you’re paying $300 to $700 per window installed, it’s good information to have. Keep reading to learn exactly what makes your windows energy efficient.


While glass alone won’t make a window energy efficient, the way glass is used in your windows can help a lot. For example, a single glass pane in a wooden window frame won’t do much at all to retain heat. Double- and triple-paned windows, on the other hand, have a much higher heat retention rate. But remember: the number of glass panes doesn’t necessarily determine energy efficiency. For the best results in your area, it’s best to consult the company that installed your windows.


Nearly all energy efficient windows have this feature in common. Warm spacers are designed specifically to reduce conductivity. They are what separate the glass panes within your windows, and are the most vulnerable places for heat loss during the colder months. Warm edge spacers are used primarily to prevent the loss of heat or cool air from your home. If you feel air leakage coming from a window that’s supposed to be energy-efficient, it’s likely there’s a glass or spacer issue within.


Certain types of energy efficient windows have what is called a glaze over the glass. This glaze, which is typically clear and can’t be seen with a naked eye, can actually help your windows be more energy efficient. If you want, you can also opt for tinted glazes. Ultimately, glazes help prevent sunlight from heating up your home and can prevent the transference of cold air, as well.

Determining whether windows are energy efficient or not is really a matter of knowledge. And now that you know these handy facts about your residential windows, you’ll be able to make informed decisions about them.