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WHAT MAKES A WINDOW ENERGY-EFFICIENT? – PART 3: ENERGY-EFFICIENT FEATURES IN WINDOWS

Choosing a window made from the right material and in a particular style can greatly improve your home’s energy efficiency. However, certain features also contribute, ensuring the best application of ventilation, insulation and illumination for your property. The following is a rundown of some of the most energy-saving window features.

  1. Weatherstripping

Weatherstripping refers to the strips of rubber or vinyl found on the edges of the window frame. When the window is fully closed, the weatherstripping acts as an insulator, sealing off gaps between the sash and the frame to prevent moisture, wind and dirt from getting inside. Having good quality weatherstripping helps prevent unregulated outdoor air from getting inside and affecting the stability of indoor temperatures.

  1. Low-E and Reflective Coating

Low-emissivity and reflective coating enables a window to block heat from the sun and reflect heat back inside your home. They differ, however, in that low-E coating does not impede the level of natural light a window lets in.

  1. Multi-Pane Glazing & Gas Fills

Multi-pane glazing means more than one layer of glass is used in a window. Using several glass layers improves insulation because less heat is transferred. This function is further complemented by heavy gas (usually argon or krypton) that fills the space between the layers of glass and slows heat transfer.

  1. Window Treatments

Though not exactly a window feature, the use of window treatments improves energy efficiency by further preventing heat inside from getting out and heat outside from getting in. With air leakage further kept to a minimum, indoor temperature remains stable.

Windows look great but they can be greatly functional as well. Making the effort to choose energy-efficient windows when you’re looking for a replacement will help you address more than one need, ensuring you make the most out of your investment.

Reviews

"Have nothing but great things to say about the window installation done today by John Hutchinson with Renewal by Andersen! He was friendly, personable and professional and did a great job installing. He did a great job of putting down roller pads and tarps with next to zero clean up. Would highly recommend them for any window replacement needed!"

Mark V.
Jun 26, 2025

"We had our new Renewal by Andersen windows installed on June 5th & 6th, 2025 and we LOVE them! The quality, beauty, and functionality are best-in-class! The whole experience from dinner presentation at Lazy River Grill, the initial in-home sales consultation and measurement, the regular communications from the salesman and concierge, and the installation team’s professionalism and skills made the process so seamless. This is the second home we have opted for Renewal windows and doors and have been delighted both times! Thank you Renewal by Andersen STL! "

Jeff C.
Jun 7, 2025

"I had an excellent experience with RbA STL. Our designer, Courtney, was great and the finished product is awesome. The installation was easy and the gentlemen left our home cleaner than they found it upon entering. I would recommend RbA STL - you’ll get tired from their constant contacts, and that’s a GOOD thing!"

Jeramy D
Jun 3, 2025

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