Energy Efficient Low E4 Glass

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  • Up to 56% more energy-efficient in summer and 45% more efficient in winter compared to ordinary dual-pane glass. Depending on where you live, that can cut your energy bills up to 25%.
  • Innovative coating reduces water spots and makes cleaning easier
  • Blocks 83% of UV rays that can fade fabric and damage your furniture
  • Significantly reduces the level of sound entering your home

Andersen High-PerformanceTM Low-E4® glass, the next generation of premium glass technology, is standard on all Renewal by Andersen windows and Frenchwood® patio doors.