We stand firmly behind the quality of all OKNA 820 Series windows we install, and would easily compare them to premium brand windows costing two to three times as much. Our 820 Wonder Choice windows have become increasingly popular in the past few years, due to their stylish appearance, reliable weather resistance, leading energy efficiency and overall value.
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OKNA 820 Series
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One of the most impressive attributes of the 820 Sliding OKNA windows, is the highly-elegant profile and design. It has been crafted to unite high syle, uncompromising protection and years of reliable performance.
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The 820 Series gives your home the look of much more expensive wood windows, while simultaneously giving you the protection and easy maintenance you demand from new or replacement sliding windows.
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Sometimes you just want to open your sliding windows just enough to let in a light breeze, without compromising safety or peace of mind. Spring loaded latches make for effortless operation and total convenience.
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A standard slim sash profile and tamper-resistent cam design, makes the 820 series OKNA sliding windows last much longer than windows with traditional locking systems.
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To give your new sliding windows the most quiet operation possible, special bumbers come standard on all 820 Series windows. Ask your Wonder Windows consultant why we proudly recommend OKNA sliding windows in Western NY.
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Heavy duty rails have been specially-mounted on brass wheels, to provide effortless gliding motion that will make your 820 Series windows a joy to use!
Interior Options
In addition to traditional Euro-white, Wonder Windows offers the 800 Series windows in three additional shades. Of course, we understand that your imagination knows no boundaries, and we can custom order your new windows in literally thousands of colors. The heat reflective coatings used to custom-color your windows are environmentally safe, and guaranteed to keep their beautiful appearance for years to come.
Euro-White
Natural
Winchester
Cognac
Melrose Cherry
Dark Oak
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 exteriors a vibrant and long-lasting color finish.
Almond
Sandstone
Terra Brown
Cocoa
Basic Brown
Bronze
Custom Colors
Hardware
To create a style and finish that reflects your unique taste, our hardware is designed to harmonize with our different window styles and decor ideas.
Euro-White
Antique Brass
Brushed Nickel
Matte Bronze
Grids
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
SDL 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.
Colonial
Prairie
Diamond
Glass Options
Okna Windows offers textured glass in a variety of distinctive choices that add visual interest to any design while offering variability in light control. With a range of options at your fingertips, you can find a standard glass texture for virtually every application and aesthetic, from traditional to modern.
Obscure Glass
Niagara Glass
Screens
Okna Windows offers factory-installed half screen with heavy-duty handle. Screens are removable from the inside for convenient storage. We also offer ThruVision Screens improving view thru the window protecting interior from insects and allowing perfect ventilation.
ThruVision Plus is our fiber glass improved visibility screen. This product does for windows and doors what high-definition technology has done for television viewing; it improves the view by making it sharper and more vivid.
Industry Average Screen
ThruVision Plus Screen
| Series | OKNA Enviro-Star 1800/800 Series | OKNA Enviro-Star 1800/800 Series |
| Triple Pane | Standard | Standard |
| Double Pane | Optional | Optional |
| Model Name | Super Deluxe | Deluxe |
| Glass Panes | Triple Pane | Double Pane |
| U-Factor | 0.19 | 0.27 |
| Solar Heat Gain (SHGC) | 0.25 | 0.29 |
| Visible Transmittance | 0.41 | 0.52 |
| Condensation Resistance | 72 | 63 |
| Design Pressure | DP50 | DP50 |
| Structural Performance | R50 | R50 |
| Air Infiltration | 0.05 | 0.05 |
| Foam-Filled Frames | Yes | Yes |
| Screen | ThruVision PLUS | ThruVision PLUS |
| Manufacturer's Warranty | Lifetime | Lifetime |
| Our Labor Warranty | Lifetime | Lifetime |
| Glass Breakage | Free | Free |
| ENERGY STAR Most Efficient | Yes* | Yes* |
*with triple pane glass
All results numbers based on tested window sample by NFRC and AAMA testing guidelines.
Used for comparison purposes only. Actual values may vary depending on installation, size of the window and other conditions
