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What are the Most Energy Efficient Windows for Mixed Climates?

In an effort to make your home as energy efficient as possible, it’s important to pick the best tool for the job in every respect. Picking the right window is a very important part of this process. Having a window that keeps the heat out in the summer and in during the colder seasons is very important. Especially in Eastern Washington, when you have four true seasons, you need to make the right decision. At Renewal by Andersen, we make that easy.

Our exclusive product, Renewal by Andersen®’s High Performance™ Low-E4® SmartSun™ glass packages are perfect for Eastern Washington. 

How Does High Performance Low-E4 Glass Work?

Traditional windows are equipped with single-pane glass. As a naturally conductive material, glass allows heat to easily pass through. This means homes equipped with just one pane of glass are bound to be uncomfortably warm during summer and cold during the winter season. The demand for heating and cooling would be higher during these seasons, which would result in higher energy bills.

Every Renewal by Andersen window and door replacement option is equipped with one of our High Performance Low-E4 glass packages. Double-panel glass, separated by an insulated spacer, eliminates contact between interior and exterior surfaces, reducing conductivity. Along with our Fibrex® material frames, Renewal by Andersen replacement windows meet or exceed ENERGY STAR® energy efficiency requirements. They also help block sound from the outside, resulting in a quieter home.

High Performance Low-E4 SmartSun Glass

Homeowners who require more comfort will benefit from our High Performance Low-E4 SmartSun Glass. Thanks to its low-emissivity coatings, it can block up to 95% of harsh UV rays and solar heat, but unlike tinted glass, SmartSun allows visible light through as if it’s clear glass. You can enjoy the full benefits of natural lighting without its unwanted effects, such as increased heat and faded fabrics.

During the winter season, it is important to keep heat indoors. HeatLock® Technology™ is our newest technology that complements our double-pane glazing. Heatlock Technology reflects escaping indoor radiant heat, which helps reduce indoor heating requirements. It complements the performance of our High Performance Low-E4 SmartSun glass in maintaining consistent indoor temperatures, resulting in energy savings all year round.

When you need the best replacement window contractors in the area, look for Renewal by Andersen of Spokane. Give us a call at (509) 202-4090 or fill out our contact form. We serve customers in Spokane, WA, and surrounding areas.


"Thank you to all the staff that helped us with the process our new windows. Everyone was very professional. The windows look beautiful inside and out. A big shout out to Chris and Carlos for all your hard work on the install. Thanks, George and Cindy Drinkhall"

George and Cindy Drinkhall

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