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The slider window is a popular style for homes in Connecticut. Sliding windows can give your home more modern look. They allow for greater flexibility for interior décor. In spite of simplicity of design, they are exceptionally functional and easy to use. Our sliding windows have two operating sashes for added air circulation. Both sashes can be removed for easy cleaning inside your home.

The OKNA Enviro-Star 800 Series slider is our high-end replacement window. The EnviroStar combines superb craftsmanship with an Old-World look and feel. This window model offers a myriad of glass and structural options to seamlessly blend with any décor while providing the utmost in energy efficiency. We also offer OKNA Insul-Tec 500 series.

EnviroStar 800 Series Sliding Window

  • Full 3 1/4" Depth Welded Mainframe with beveled colonial exterior features curves that are not only beautiful, but also allow for maximum weld surface resulting in strength and years of long lasting performance.
  • Heatseal® warm edge spacer system for excellent thermal efficiency and drastic reduction in the possibility of condensation on the inside of the window.
  • Full integral interlock with double weather-stripping.
  • A variety of hardware options fits harmoniously into any décor.
  • Fiberglass mesh screens standard on all windows.
  • Available in Replacement and New Construction applications.
  • Multi-chamber design that buffers interior and exterior temperatures.
  • Insulated frame and sash.
  • Available in triple-pane glass for increased energy savings and comfort.


The elegant, beveled profile of the 800 Series will enhance the beauty of your home's exterior by giving it the traditional look and feel of wood windows with the performance and ease of maintenance you can only get with vinyl windows. The 800 Series can also be painted to match any exterior.

Slim Profile Sash lock with tamper-proof cam ensures stylish look and smoother turn.

Handle style based on traditional wood windows.

Standard factory-installed bumpers ensure quiet operation.

Brass wheels allow the slider to smoothly glide across its track.

Push Button Spring-Loaded Night Latches add security while allowing both window sashes to remain partially open for ventilation.

Optional Auto-Lock features an exclusive automatic locking system which is easy to engage.


Color Options

You can choose from three exterior colors in addition to the standard Euro-White option to give your home a distinct look and enhance its Curb appeal. You can also special order custom exterior colors from a virtually unlimited selection of paints. They are environmentally safe and durable, giving your exterior a vibrant and long-lasting color finish.

Interior Options

Standard Euro-White finish and Standard Euro-White Lock

Optional Cognac finish (laminate) and Optional Brushed Nickel lock

Optional Melrose Cherry finish (laminate) and Optional Antique Brass lock

Optional Natural finish (laminate) and Optional Brushed Nickel lock

Exterior Colors





All colors except Euro-White are available at an additional charge.

Hardware Finishes

To create a style and finish that reflects your unique taste hardware is designed to harmonize with different window styles and decor ideas.

Thermal Performance Ratings

Currently, the minimum U-Value rating for windows (our climate zone) to meet Energy Star requirements is 0.30. However, The U.S. Enviromental Protection Agency has released the new minimum U-Value requirement of 0.27 that is going to take effect January 1,2016. When you are comparing performance ratings of different window models or brands, we encourage you to compare them, as we do, to the Energy Star requirements that will be effective in 2016.

Structural Performance Ratings

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