Energy Saving Your Home - Windows

Windows provide our homes with light, warmth, and ventilation, but they can also negatively impact a home's energy efficiency. You can reduce energy costs by installing energy-efficient windows in your home. Some energy efficiency improvements to existing windows can also help.

Here you'll find information about how to do the following:

Selecting New Energy-Efficient Windows

When properly selected and installed, energy-efficient windows can help minimize your heating, cooling, and lighting costs.

Achieving improved window performance in your home involves three steps:

1.Window Design Considerations

Before selecting windows for your home, you need to determine what types of windows will work best and where to improve your home's energy efficiency.

First, it's a good idea to understand the energy performance ratings of windows if you don't already. Then, you can determine what energy performance ratings you need for your windows based on your climate and home's design.

For labeling energy-efficient windows, ENERGY STAR® has established minimum energy performance rating criteria by climate. However, this criteria doesn't account for a home's design, such as window orientation. For more information, see passive solar window design.

If you're constructing a new home or doing some major remodeling, you should also take advantage of the opportunity to incorporate your window design and selection as an integral part of your whole-house design—an approach for building an energy-efficient home.


2. Window Selection

You'll find that you have several options to consider when selecting what type of windows you should use in your home.

When selecting windows for energy efficiency, it's important to first consider their energy performance ratings in relation to your climate and your home's design. This will help narrow your selection.

window selection

A window's energy efficiency is dependent upon all of its components:


Window Installation

Even the most energy-efficient window must be properly installed to ensure that its energy performance is achieved and that it does not contribute to a home's moisture problems. Therefore, it's best to have a professional install your windows.

Window installation varies depending on the types of the following materials:

Windows should be installed following manufacturing recommendations, along with the following additional guidelines (primarily for windows with fin mounting systems).

Installation Guidelines

flashing Window Openings


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