High-Performance™ Low-E4™ Glass
If it's time for you to buy replacement windows for your home, Renewal by Andersen's High-Performance™ Low-E4™ glass is for you. Get windows that stay cleaner, dry faster for easy cleaning and that have up to 99% less water spots*.
The new Low-E4™ glass reduces water spots up to 99%* and minimizes dirt build-up on the window when activated by sunlight. Andersen Low-E4™ glass saves time and money. It dries faster with fewer water spots and energy-efficient Low-E4™ glass also adds thermal protection to a home**.
High-Performance™ Low-E4™ glass reduces sound penetration and protects interiors from damaging UV rays. During shipping and finishing, a removable film protects Low-E4™ glass from dirt or mortar. Like all Andersen products, Low-E4™ glass comes with a 20-year limited warranty.
Fewer Water Spots and Easier Cleaning
High-Performance™ Low-E4™ Glass features an innovative titanium dioxide (TiO²) exterior coating, which makes cleaning easier. When this coating is activated by sunlight, dirt loosens from the glass and can be washed away by rain. The special TiO² coating also makes the glass dry faster with up to 99% fewer water spots*.
Adds Thermal Protection
Renewal by Andersen's Low-E4™ glass employs a hermetically-sealed system for optimum insulation from heat, cold and sound. A patented low-conductivity spacer separates the two panes of glass. The space between the two panes is filled with an argon gas blend to minimize the thermal transfer. Compared to ordinary dual-pane glass, High-PerformanceTM Low-E4TM glass is up to 45% more energy efficient in winter and up to 56% more energy efficient in summer.** Compared to ordinary single-pane glass, High-PerformanceTM Low-E4TM glass is up to 68% more energy efficient in winter and up to 61% more energy efficient in summer.**
Helps Keep UV Rays Outside
High-Performance™ Low-E4™ glass works like a sunblock to filter ultraviolet (UV) rays that can fade fabric and damage furniture. Ordinary dual-pane glass lets 63% of UV light pass through. High-Performance™ Low-E4™ glass is layered with 11 microscopic coatings that cut UV transmission down to 17% with virtually no effect on the clarity or color of the light that enters your home.
Reduces Sound Penetration
In addition, High-Performance™ Low-E4™ glass also reduces sound penetration significantly, even when compared to other double-pane glass.
Standard Feature
Low-E4 glass is exclusive to select Andersen® windows and doors, and is included as a standard feature on all Renewal by Andersen® window products.
* exterior glass only, when activated by sunlight
** Values are based on comparison to U-Factor and SHGC ratings for clear glass non-metal frame window default values from the 2006 International Energy Conservation Code (IECC).