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OKNA 510 Picture WindowIf you need a picture window that delivers the very best in energy-efficiency, features, low maintenance and affordability, you need look no further than OKNA 510 Series windows from Wonder Windows in Rochester.  They offer many of the features and technology found in more expensive windows, with patented features that make them truly one of a kind.

The 510 Series is ideal for routine Rochester window replacement projects, as well as for those building a new home in the WNY region.

  • Designed to drastically reduce moisture and condensation
  • One of the most commonly-requested picture window replacement 
  • Highly energy-efficient performance on a solid welded frame
  • Easy-glide hardware and locks allow for effortless operation
  • 4 popular colors and endless choices of custom shades
  • Patented warm-edge spacers boost thermal performance greatly
  • If you're looking to replace an oddly-sized picture window, without having to spend a small fortune on custom designs, the OKNA 510 series offers dozens of size and shape options.

  • The 3.25" precision-welded frame give the 510 picture window series strength, durability, enhanced style and many years of reliable performance and good looks.

  • Why are picture windows such a wonderful option for homes in the Rochester area? They're arguably among the most durable types of residential windows, and known for thier ability to resist even strong winds and rain over long periods of time.

  • OKNA 510 Picture Windows, like all OKNA windows, have an innovative design that greatly reduces drafts, to provide a more comfortable interior while better-controlling monthly energy costs.


Interior Options

Our company offers two interior colors in addition to our standard Euro-White to give your home a distinct look.

Optional colors are available at additional cost.



Exterior Options

Okna Windows offers six exterior stock color selections in addition to the standard Euro-White option to give your house a distinct look and enhance its curb appeal. You can also select custom exterior colors from a virtually unlimited selection of paints. Our paints are environmentally safe and durable, giving your exterior a vibrant and long-lasting color finish.



Terra Brown


Basic Brown


Nicol's Black

Custom Colors


GBG grilles consist of aluminum bars sealed in the insulation airspace between the two panes of glass. Because the interior and exterior glass surfaces are not affected, cleaning your windows is a much easier task.

Permanent interior and exterior grids with spacer will provide a truly authentic look. Interior grids are available in Euro-White or wood laminates to match your home's decor. External grids are available in Euro-White or colors to match product exterior.

Flat Grid

Contour Grid

Grid Patterns

Are you looking for a stunning design detail to instantly set your home apart both inside and out? A choice of decorative grilles for your Okna Windows & Doors can highlight the architectural style that speaks to you.




          Energy Star Comparison To
Glazing Option U-Value SHGC VT CR Minimum* Energy Star Minimum
Dual Glazed            
Clear Glass 0.46 0.63 0.65 46 0.30 Does not qualify
With ESP 0.27 0.31 0.56 64 0.30 10% Better
Deluxe 0.24 0.31 0.56 64 0.30 20% Better
Triple Glazed            
With ESP 0.20 0.27 0.44 70 0.30 33% Better
Deluxe 0.18 0.27 0.44 76 0.30 40% Better
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) R75 R15  
Air Infiltration cfm/ft2 <0.01 0.3 3000% Better
Water Penetration mph 66 33 100% Better
Structural Integrity mph 210 94 123% Better

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.