In the average home, as much as 30% of the energy used is due to heat loss through windows. Inefficient fixtures drive up energy costs significantly, so whether you’re building a new house or considering window replacement, it’s important to choose eco-friendly models. Here’s what you should know before buying to ensure you make the right choice.

Common Questions About Energy-Efficient Windows 

How do I select the most efficient windows?

When shopping for window replacements, look for models that are labeled ENERGYSTAR®-certified. To choose between different models, compare the National Fenestration Rating Council (NFRC) labels, which will provide information on the amount of air and solar heat that penetrates the glass.

Finally, consider the quality of the window’s craftsmanship, which is often reflected in the warranty provided. Longer warranties mean the manufacturers are more confident in their products.

What makes a window ENERGYSTAR®-qualified?

Although fixtures don’t have to meet any technical requirements to be qualified, most have similar features, including double and triple panes with air or gas between them. The glass itself is typically Low-E, meaning it’s been treated to deflect UV rays and prevent air loss. They also use quality framing materials.

That being said, the ENERGYSTAR® distinction is given to models that are manufactured by the organization’s partners, have been evaluated by the NFRC, and meet the minimum efficiency ratings determined by the NFRC. 

What’s considered eco-friendly for Wisconsin’s climate?

Some efficient windows are better at keeping homes warm, while others are designed for cooling. In Wisconsin, the best windows are those that allow for more solar heat gain in the winter and decrease drafts.

By comparison, windows with higher U-ratings (the ability to block solar heat) are more desirable in the South.

Can existing windows become more energy-efficient?

Yes, if they are new and undamaged. To keep the heat in, re-caulk the areas around the frames or install new weatherstripping. Installing window treatments, including curtains, also creates additional barriers between the interior and exterior of the home.

If you want to update the windows in your house for more energy efficiency, turn to BGS Glass Service in Waukesha, WI. They’ve served the Greater Milwaukee Area since 1970. This locally owned and operated full-service glass company offers everything from window replacement to glass repairs to seal drafts and improve efficiency. They carry thermopane glass, which contains air pockets to reduce heat loss. Learn more about their eco-friendly fixtures online or call (262) 513-2806 to schedule an appointment.