500 Series - Insul-Tec - Double Hung - Triple Glaze Deluxe w/krypton Gas

If you are looking for the absolute top performance in a double hung replacement buy this window. For durability, beauty and efficiency the Okna 500 triple pane with krypton is wowing homeowners. One of the very best high efficiency, top performers at any price. Typically comparing our price to equally performing windows our price can not be beat. 

  • 50% Better than Energy Star┬« minimum
  • 1500% Better protection than Industry Standard for Air Infiltration (AI)
  • Triple pane with krypton Gas is quiet and highly energy efficient
  • 3┬╝" Deep welded frame for superior and long lasting performance.
  • The Heatseal┬« warm edge spacer greatly reduces condensation.
  • Full integral interlock with double weather-stripping.
  • Available Auto-Lock feature for security.
  • 4 standard and custom colors available 
  • Includes fiberglass mesh half screens.
  • Optional locking screen for added security.
  • Perfect double hung for new Construction or as a replacement window.
  • All Okna windows are custom made for each opening.
          Energy Star Comparison To
Glazing Option U-Value SHGC VT CR Minimum* Energy Star Minimum
Triple Glazed              
Deluxe/krypton Gas 0.15 0.26 0.43 76 0.30 50% Better


      Industry Comparison To  
  Our Windows Minimum Industry Minimum  
AAMA Rating R50 R15      
Air Infiltration cfm/ft2 0.02 0.3        1500% Better
Water Penetration mph   54 33           64% Better  
Structural Integrity mph 171 94           82% Better