Low E4 Glass is a high performing glass that improves energy efficiency over standard dual pane glass
High performance glass is Low E coated glass with an argon gas fill and is nearly 1/3 more efficient that dual pane and also greatly reduces ultra violet light that can cause material fading inside your home
Andersen AN55 Awning Sash with Low-E4 Glass in White Color Works with Perma-Shield Casement Windows manufactured from 1966 to Present
Andersen TW2646 (Upper Sash) White Exterior and White Interior High Performance LowE4 Tempered Glass (1992 to May 2010) Works with 400 Series Tilt-Wash Double-Hung Windows manufactured from 1992 to May 24
Andersen TW3432 (Upper Sash) Sandtone Exterior and Natural Pine Interior High Performance LowE4 Glass (1992 to May 2010) Works with 400 Series Tilt-Wash Double-Hung Windows manufactured from 1992 to May 24
Andersen Albany Style (Double Active) Hinged Door Hardware Set in White Unit Number_2856 Low E4 Glass is aAndersen Albany Style (Double Active) Hinged Door Hardware Set White Color Works with 400 Series Frenchwood Hinged (In Swing and Out Swing) Patio Doors manufactured from 1988 to Present. Hardware set is for a (double active) hinged door in which two doors will open. Works on the active and passive door panels. Complete hardware trim set includes inside and outside handles, inside and outside escutcheon plates, inside thumb latch lock, mounting studs,