Window Glass Types by Renewal by Andersen

Whatever the weather, the choice is always clear

Whether it’s the location, the architectural style, or the family who lives there, every home is unique. The same goes for that home’s energy bill. At Renewal by Andersen, we have a glass solution for every climate, and our windows take advantage of the newest technologies to help cut costs and keep your family comfortable.

We’ve replaced over four million windows in over 600,000 homes across the country. We’ll help you sort through the details and features of our glass options like efficiency in different environments, visible light transmittance, and ultraviolet (UV) protection, so you can find the ideal solution for your home when it comes time to replace your windows. Until then, take a look at the glass solutions we offer below.

High-Performance Low-E4® Glass

This glass type is perfect for homes in seasonal climates where both heating and cooling costs are a concern. High Performance™ Low-E4® glass is 56% more energy efficient in summer and 47% more energy efficient in winter as compared to ordinary dual pane glass1.

High-Performance Low-E4® SmartSun™ Glass

Our High-Performance™ Low-E4® SmartSun™ glass is the most energy-efficient glass option we have ever offered. It’s 70% more energy efficient in summer and 49% more energy efficient in winter as compared to ordinary dual pane glass1. Without tarnishing the view, Low-E4® SmartSun™ glass blocks 95% of harsh UV rays that not only heat up the room, but can damage drapes, artwork, and furniture. This glass option is unique in that it has the thermal control similar to tinted glass, but with nearly the visible light transmittance of clear glass. What’s more, our Low-E4® SmartSun™ glass cuts down on noise pollution by reducing sound penetration into your home.

High-Performance Low-E4® SmartSun™ Glass with HeatLock® Technology

Meeting today’s most stringent energy codes and requirements, HeatLock® Technology™ is our newest technology. By reflecting the escaping room-side radiant heat back into the room, Low-E4® SmartSun™ glass used in combination with our  HeatLock® Technology™ coating offers near triple-pane performance in a dual-pane glass. 

High-Performance Low-E4® Sun Glass

For hot, dry climates with little to no shade, our High Performance™ Low-E4® Sun glass helps reduce cooling costs by filtering out heat from the sun. By utilizing a subtle tint coating to reduce visible light, Low-E4® Sun glass has our highest rating against solar heat gain, helping to keep your home cooler.

Nobody takes energy efficiency and the goals of ENERGY STAR® more seriously than Renewal by Andersen. Our High-Performance™ glass solutions make it possible for homeowners across the country to get replacement windows and patio doors that are ENERGY STAR® certified. With a glass solution for every climate, Renewal by Andersen® windows can help you save money on your energy bills. Schedule your free in-home consultation with a Renewal by Andersen representative to get started on your replacement window project, and to find out more about our glass solutions, the glass patterns we offer, and the strength of our tempered glass option.

1 Values are based on comparison of Renewal by Andersen® double-hung window U-Factor to the U-Factor for clear dual pane glass non-metal frame default values from the 2006, 2009, 2012, 2015, and 2018  International Energy Conservation Code "Glazed Fenestration" Default Tables.

“ENERGY STAR” is a registered trademark of the U.S. Environmental Protection Agency.

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Step 1

Design Consultation

Our design consultants provide in-home or no-contact virtual meetings to listen to your design needs and provide a plan to improve your home.

Our Hassle free process step 2 - MEASURE & MANUFACTURE
Step 2

Measure & Manufacture

Project Technicians ensure accuracy and answer any last minute questions before sending in the order for your fully customized windows.

Our Hassle free process step 3 - INSTALLATION
Step 3


Our Installers treat your home as if it were their own and clean up afterwards.

Our Hassle free process step 4 - CUSTOMER CARE
Step 4

Customer Care

A robust limited warranty is backed by a commitment to making sure your windows function as expected.