The high-end Okna 800 series double hung, double pane with clear glass has a high density composite reinforcement in the frame for even more durability. Provides a traditional look of wood without the maintenance. There are many glass options to consider.

  • 3000% better air infiltration protection than Industry Standards. WOW 
  • Magnetic Seals dramatically reduce drafts and save energy
  • Maintenance free rigid multi-chamber vinyl profile.
  • Full 3 1/4" Depth Welded Mainframe for long lasting performance.
  • Heatseal┬« warm edge spacer system improves thermal efficiency and lowers condensation on the inside of the window.
  • Full integral interlock with double weather-stripping.
  • Numerous hardware options for any decor.
  • Factory installed fiberglass mesh half screen with Optional locks
          Energy Star         Comparison To
Glazing Option U-Value SHGC VT CR Minimum*              Energy Star Minimum
Dual Glazed              
Clear Glass 0.45 0.59 0.61 45 0.30              Does not qualify


      Industry Comparison To  
  Our Windows Minimum Industry Minimum  
AAMA Rating R 60   R 15      
Air Infiltration cfm/ft2 0.01     0.3          3000% Better
Water Penetration mph 59    33             79% Better  
Structural Integrity mph 187     94            99% Better