Renewal by Andersen offers three different glass options:

1. High-Performance™ Low-E4® glass
2. High-Performance™ Low-E4® SmartSun™ glass
3. High-Performance™ Low-E4® Sun glass

High-Performance™ Low-E4® glass is our standard offering. High-Performance Low-E4 glass is 45% more energy-efficient in winter and 56% more efficient in summer compared to ordinary dual pane glass.* Depending on where you live, that can cut your energy bills up to 25%. High-Performance™ Low-E4® glass blocks 83% of harmful UV rays.High-Performance™ Low-E4® SmartSun™ glass is the most energy-efficient glass option we have ever offered. High-Performance Low-E4 SmartSun™ glass is 47% more energy-efficient in winter and 70% more efficient in summer when compared to ordinary dual pane glass.† It has our highest efficiency rating in cool weather and is exceptional in hot climates where solar heat gain can lead to excessive air conditioning expense.SmartSun™ glass blocks the sun’s heat, while letting in almost as much natural daylight as clear glass, reducing your need for artificial lighting. What’s more, SmartSun glass blocks an amazing 95% of harmful UV rays which helps reduce fading on your carpet, drapes, artwork and furniture but has virtually no effect on the clarity or color of the light that enters your home.High-Performance™ Low-E4® Sun™ glass offers our highest rating against solar heat gain coming through your glass, helping keep your home cooler in warm weather. Our Sun glass has a tint coating applied,** reducing the amount of visible light and sunshine streaming in from too bright to just right!* Values are based on comparison to U-Factors and SHGCs for clear glass non-metal frame default values from the 2006 International Energy Conservation Code (IECC)** A study of identical homes comparing Low-E to ordinary dual-pane glass showed a 25% savings on cooling bills, 10% on heating. Savings may vary geographically.*** Exterior tint may vary from unit to unit.† Values are based on comparison of Renewal by Andersen® double-hung insert window SHGC to the SHGC for clear glass non-metal frame default values from the 2006 International Energy Conservation Code.You can hear more about your glass options by scheduling a free in-home estimate with a Renewal by Andersen consultant.