What Makes A Window Energy Efficient?

The mantra all over the world now is to improve the energy efficiency in homes to reduce the carbon footprint caused by power generation. As the effects of global warming are severe and steps are being taken to contain further warming of the climate. To achieve this global goal, no stone should be left unturned. Knowing that windows and doors play a crucial role in the energy efficiency of a home, their condition must be ascertained to ensure that they are in a good state.

If you discover that your windows and doors are not energy-efficient, endeavour to replace them soon. But you may wonder and ask “What makes a window energy efficient?” Here are some of the features that make windows energy-efficient:

1. The Frame’s Quality

Windows and doors are made up of many components. One crucial component of a window is the frame. The quality of the window frame is very important and it is determined by the material it is made of. Some of the materials used for making frames include wood, vinyl, fibreglass, aluminum, composite, and a combination of these materials. Vinyl is more efficient than the rest. You can improve its efficiency by insulating it with foam.

2. Multiple Panes of Glass

Another factor that makes a window energy-efficient is the number of panes of glass it has. The higher the number of panes of glass a window has, the higher the level of a window’s energy efficiency. Installing windows with two or three panes of glass will boost the energy efficiency of the home. The panes will block heat transfer because Argon gas is filled inside the space between the panes.

3. Low-E Glass Coating

Low-E glass coating also improves the energy efficiency of a window. Low-E refers to low emissivity. The coating reflects ultraviolet and infrared light and prevents the outside heat from getting into the home. This feature is crucial to protect your furniture, curtains, and carpet from fading and sun damage.

4. Gas Fills

Filling the space between the panes of glass with gas increases a window’s level of energy efficiency. Different types of gas are usually used – the gas is usually colourless, odourless, and non-toxic. It increases the window’s insulation and makes it more energy-efficient. The most popular gas used is Argon gas.


The factors above are crucial when assessing the energy efficiency of a window. Remember that the levels of windows and doors’ energy efficiency are directly related to the overall energy efficiency level of a home. As a result, look for those features when searching for replacement windows for your home.

Post Author: Jennifer Sapp