Wonder Windows
Rochester - Buffalo - Syracuse
634 South Avenue, Rochester NY 14620
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OKNA 800 Series Performance - Double Hung Windows

Call it the pinnacle of premium replacement windows if you will. OKNA 800 Series windows are as expertly designed as they are technologically advanced.  Patented Enviro-Star technology combines the highest caliber of workmanship, with a timeless design that has overtones of a more historic and prestigious look.  Each OKNA 800 window is custom made-to-order, so you'll always be assured of a snug and energy-efficient installation.

OKNA 800 Double Hung Window

800 Series - Double Hung

  • EnviroStar
  • Double weather stripped integrated locking meeting rail
  • Maintenance-free and multiple-chambered profile
  • Robust & long-lasting 3.25" precision-welded frame
  • Beautiful curves from a timeless colonial design style
  • Known for providing years of maintenance-free enjoyment
  • Superior thermal performance via patented Heatseal® spacer
  • Warm-edge technology virtually eliminates all condensation
  • We have an extensive selection of stunning window hardware
  • All 800 Series windows come standard with durable mesh Thru Vision screens
  • We can install additional locking mechanisms at your request
  • Perfect for window replacements & new builds in Rochester 
  • NFRC U-Factor: 0.26   Air Infiltration: 0.01   Solar Heat Gain: 0.30
Overview - Options & Accessories - Performance
* Okna       Energy Star Comparison To
Glazing Option U-Value SHGC VT CR Minimum* Energy Star Minimum
Dual Glazed            
with ESP 0.28 0.29 0.53 62 0.30 7% Better
Deluxe 0.26 0.29 0.53 62 0.30 13% Better than ENERGYSTAR®
Triple Glazed            
with ESP 0.22 0.25 0.42 69 0.30 27% Better
Deluxe 0.20 0.25 0.42 72 0.30 33% Better than ENERGYSTAR®

U-Value, SHGC, VT, CR values may slightly change for windows made with GBG (Grids Between Glass)

  • SHGC - Solar Heat Gain Coefficient
  • VT - Visible Transmittance
  • CR - Condensation Resistance
  • Deluxe - ESP & Foam
  • * Northern Climate Zone
    Industry Comparison To
  Our Windows Minimum Industry Minimum
AAMA Rating (38 x 63) R60 R15  
Air Infiltration cfm/ft2 0.01 0.3 3000% Better than ENERGYSTAR®
Water Penetration mph 59 33 79% Better than ENERGYSTAR®
Structural Integrity mph 187 94 99% Better than ENERGYSTAR®

Water Penetration mph - Specifies wind load pressure in mph a window can withstand without leaking, under rain equivalent to 8" per hour. Structural Integrity mph - Wind load in mph a window can withstand before breaking.

All results numbers are based on tested window sample by NFRC & AAMA testing window guidelines. Use for comparison purposes only. Actual values may vary depending on installation, size of the window, and other conditions.

Energy Star Most Efficient 2015 Windows Angies List National Fenestration Rating Council Lead Safe Certified Firm

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Local: (585) 654-7000
Toll Free: (800) 240-0595
Wonder Windows
634 South Avenue
Rochester NY 14620

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