High Performance Glass for Extreme Weather

Demanding Climates Like the Northeast Call For Superior Glass
Low E Glass
climate

Performance criteria for windows and skylights are based on ratings certified by the National Fenestration Rating Council (NFRC), and vary for each of the climate zones shown in the map above. To find the climate in which you are located, search here.

E III Glazing

  • Elevated level of solar heat control developed specifically for Northern regions
  • High visibility and light allowance without allowing harmful UV rays to pass through
  • Low reflective levels allow for clear views at all times of the day
  • Low-E coating protects your home from outside temperatures in every season
low-emissivity coated glass – surface 3
Argon gas – between the panes
Brochure
Energy Star III

ES4 Version 7 Glazing

  • Thermal insulation blocks solar rays, saving on energy costs year-round
  • Exceptional Visible Light Transmission (VLT) at 77% for abundant daylighting
  • Low reflective levels allow for clear indoor views at all times of the day
  • Low-E coating blocks outside temperatures and helps control indoor temps
low-emissivity coated glass – surface 2
low-emissivity coated glass – surface 4
Argon gas – between the panes
Brochure
U4

DOE – R5

  • Our patented glazing system provides superior insulation from heat loss, returning an average annual savings of up to 40% on energy bills.*

*Based on exterior replacement utilizing 16 windows. Savings are average and may vary according to home type and location.

low-emissivity coated glass – surface 2
low-emissivity coated glass – surface 4
Argon gas – between the panes
Available in SELECTED WINDOW STYLES ONLY
More Information
DOE R-5 Cutaway

Clear Insulated Glass

  • Double-paned glass with an argon gas fill significantly increases energy efficiency
  • Ideal for low-cost applications like garages and stand-alone sheds
Brochure

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