Certified Window

Alpen Zenith ZR-6 Fixed High Profile

Alpen High Performance Products Orange Path Certified (Valid through 2028-04-01)

Overview

  • U-Value, Whole Window

    * 0.13 BTU/hr·ft²·°F 0.77 W/m²K
  • U-Value, Center of glass (U-COG)

    * 0.11 BTU/hr·ft²·°F 0.64 W/m²K
  • SHGC-COG

    0.275
  • Operation Type

    Fixed
  • Frame Material

    Fiberglass
  • IGU Panes

    Triple
  • Glazing Name

    SolarControl-6 TGT [35mm oa]
  • Rec. Climate Zone(s)

    • 1
    • 2
    • 3C
    • 3B
    • 3A
    • 4C
    • 5C
    • 4A
    • 4B
    • 5A
    • 5B

The U-values in the Overview section apply to Zones 4A/4B. For other climate zones, refer to the Phius Certified Product certificate available hosted on this page. All other performance data is not climate-specific.

IGU (Glazing) Information

  • Panes

    Triple

  • Gas Fill

    Argon

  • Spacer

    Ködispace 4SG

Frame Information

Head Sill Left Jamb Right Jamb
Frame height 2.83 in 72 mm 2.83 in 72 mm 2.83 in 72 mm 2.83 in 72 mm
U-Frame 0.15 BTU/hr·ft²·°F 0.85 W/m²K 0.15 BTU/hr·ft²·°F 0.85 W/m²K 0.15 BTU/hr·ft²·°F 0.84 W/m²K 0.15 BTU/hr·ft²·°F 0.84 W/m²K
PSI-Spacer 0.018 BTU/hr·ft·°F 0.031 W/mK 0.018 BTU/hr·ft·°F 0.031 W/mK 0.018 BTU/hr·ft·°F 0.031 W/mK 0.018 BTU/hr·ft·°F 0.031 W/mK