OKNA Enviro-Star windows

When you want to get to top of the line, then you should consider OKNA Enviro-Star ( also called 800 Series)  Double Hung windows. These replacement windows are the highest window line of the OKNA manufacturer.

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The Beaty of the OKNA Enviro-Star Windows ​

Eviro-Star series double hung window is a breakthrough product, which available in many glass and structural options. This double hung window when installed into your house blends in seamlessly and rejuvenates your house for many years to come.
    The interior of the window   makes your room comfortable. When you install Enviro-Star windows, you can feel yourself proud and happy. The window comes with balance covers, no spider web or dust is gonna get into the balance channels. Night latches are standard as well. The Eviro-Star window has many interior colors and options.
    The thickness of the frame is a bit on higher side of 3 1/4. If you have smaller windows in the house, then you are gonna loose some of the glass area. When most of the windows in your house are big, then you are not gonna notice any big difference.
    The elegant beveled exterior profile of the Enviro-Star window will make the exterior of your house to look unforgettable and long lasting in memories of your family and friends. The 800 series double hung windows can be painted to match any exterior. These windows, once installed, are gonna look like the eyes of the most beautiful person you ever met.

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Performance of The OKNA Enviro-Star Window

Okna 800 series double hung windows have the highest energy efficiency ratings in the industry. The U-Factor of the window is 0.20, SHGC 0.29. The window comes with triple pane glass, triple layer of weather stripping on both sashes. All that means, that you are gonna be able finally donate that heavy wool sweater and wool socks. The temperature in your house is gonna stay stable.
  Air infiltration is 0.01, which one of the best in the industry. No doubt that the air is gonna come in to your house or out of the house with your permission only.
  At the bottom of the window sash there is magnetic seal, which draws the bottom sash to the window seal, so it closes like a door of a fridge.
  The balance system of the window is very reliable as well, does not need any adjustment or lubrication. You can open and close it about 28000 times.

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​Quality of The Enviro-Star Window

The 800 series window is made from a high quality virgin vinyl. What does it mean? Well, it means, that all the OKNA windows installed into your house are not gonna fade too much in the next 10-15 years. You are gonna enjoy the true colors of the window for many years to come. The frame and sashes are fusion welded for extra strength and beauty.
    High density composite reinforcement is in the top part of your window sash. It makes the window very durable and 171 mph wind resistant.


All in all, when you install these windows into your house, you are gonna feel yourself proud about that achievement. In other words your house is gonna become your precious nest, your fortress, where you are gonna feel yourself comfortable, happy and secure.

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Eviro-Star (800 series) Double Hung Window Key Points:

Positive Points:

• Solid Warranty
• The Frame of the window has double lag and magnetic seal
• The window is equipped with high density composite reinforcement, which makes the window very durable
• The window is available in many color options
• The frames and sashes are fusion welded for extra beauty and performance
• Balance covers are standard
• Triple Pane glass package
• High energy efficiency ratings

Negative Points:

• The frame and sash combined is on the thicker side of 3 1/4