400 Series - Precision Weld - Picture Window - Triple Glaze with ESP

The ESP (Energy Saver Package) on the Okna triple pane 400 Precision Weld replacement picture window provide superior performance and total value. If you demand performance and value this is a great option. Spending money on replacement windows is a big investment let the professionals help you decide on an educated decision. 
  • 33% Better than Energy Star® minimum
  • 3000% Better AI protection
  • A great choice to keep the cold out with excellent thermal efficiency
  • Welded sash & frame for overall durability
  •  Custom made for your home
  • Available in custom exterior colors as well as four standard colors
          Energy Star Comparison To
Glazing Option U-Value SHGC VT CR Minimum* Energy Star Minimum
Triple Glazed              
With ESP 0.20 0.28 0.46 69 0.30 33% Better


      Industry Comparison To  
    Our Windows Minimum Industry Minimum  
AAMA Rating R 75 R 15      
Air Infiltration cfm/ft2 0.01 0.3  3000% Better
Water Penetration mph 66 33    100% Better  
Structural Integrity mph 210 94    123% Better