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Alpen Windows

Alpen Zenith Series ZR-6 windows incorporate advanced technologies, enhanced design, and high performance in an affordable package. Free shipping included

*Custom sizes available upon request. See contact page. 

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Full-frame R-values up to R-6.7, the Zenith Series ZR-6 offers outstanding value for residential and commercial buildings as well as retrofit and new construction.


Benefits of the Alpen Zenith Series ZR-6:


  • NFRC Certified thermal performance up to R-6.7
  • Exceed Energy Star® standards
  • AAMA Gold Labeled to Commercial Window (CW) performance
  • Superior air and water infiltration resistance
  • Glazing options for solar control and passive heat gain.
  • Advanced triple-pane, suspended-film glazing technology stabilizes interior glass surface temperature to create comfortable indoor living spaces year-round.
  • 99%+ UV blockage protects interior finishes
  • Center-of-glass R-8

Additional information

Window Style

Awning, Casement, Fixed

Frame Color

Black, Bronze, White


Tempered, Untempered

Window Rough Openings

18"x24", 18"x36", 24"x36", 24"x84", 36"x48", 60"x48"

Zenith Series Information


Zenith Series ZR-6

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