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High Performance™ Low-E4® Glass: A Closer Look

You can discover the ideal window for your home. Renewal by Andersen® window products offers the best possible thermal and acoustic performance, ultraviolet (UV) protection and visible light transmission. This is because our High Performance Low-E4® glass is ideal for hot, dry climates due to its superior heat and UV light filtering characteristics. 

In this essay, a window replacement contractor, Renewal by Andersen of Atlanta examines one of our home replacement windows’ most distinguishing features: its High Performance Low-E4 Glass. Discover the benefits of this top-of-the-line glazing for your home.

  • High-Performance Low-E4 Glass – High-Performance Low-E4 helps save money on heating and cooling. This option saves 56% in the summer and 47% in the winter compared to regular dual-pane glass. This glass container blocks up to 84% of harmful UV rays. It also transmits visible light and absorbs solar heat well.

  • High-Performance Low-E4 Sun™ Glass – This type of glass is heat and UV-resistant. Its modest tint layer reduces glare and excess light, earning it our top solar heat gain rating. High-Performance Low-E4 Sun Glass can help keep your home cool in the summer by reflecting most of the sun’s heat away from it.

  • High-Performance Low-E4 SmartSun™ Glass – Up to 95% of UV rays can be blocked with this window replacement glass option, while solar heat gain is considerably reduced. If you’re concerned about the color of your draperies, furniture, or artwork fading, this is the glass for you. Other than tinted glass, this is the only glazing choice that provides both visible light transmission and heat management.

  • High-Performance Low-E4 SmartSun Glass with HeatLock™ Technology™ — Andersen’s latest technology is HeatLock Technology. It meets most of today’s most strict energy regulations. It has all the advantages of SmartSun glass, but with a thermal management layer on the room-facing side. HeatLock windows help preserve heat in the home on cold days.

  • High-Performance Enhanced Triple Pane Glass & Enhanced Triple Pane With Smartsun™ Glass – Renewal by Andersen windows with Enhanced Triple Pane glass maintain the warm, calming air inside your home. This glass is one of the most energy-efficient ENERGY STAR®-certified items in 2021.

Renewal by Andersen of Atlanta is dedicated to providing superior goods and customer service. From customized replacement windows that allow you to personalize almost every component to a friendly, professional staff that will assist you throughout the buying process, we try to exceed your expectations.

To schedule a free estimate and in-home consultation with one of our local casement window and door specialists, call (404) 737-6934 or complete our contact form. We provide services to residents and companies in Atlanta and neighboring communities.


"Awesome job! Everything was completed as communicated. Everyone was very courteous and friendly. Other contractors should follow the Renewal by Andersen footprint."

Richard & Camille, Lawrenceville GA January 22
May 25, 2016

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