The OKNA Enviro-Star is our high-end Replacement Window. The Enviro-Star combines superb craftsmanship with an old world look and feel. This Series offers a myriad of glass and structural options to seamlessly blend with any décor while providing the utmost in energy efficiency. Since all OKNA products are custom-made, you can be sure of a perfect fit every time.

    1. Double Hung

      A window consisting of two sashes operating in a master frame where both the upper and lower halves slide vertically past each other and both tilt in for cleaning. View Product
    1. Sliding Window

      A window consisting of two or more sashes which operate by sliding horizontally past each other.
    1. Picture Window

      A fixed window which does not open for ventilation.
    1. Hopper Window

      A window where the sash is hinged at the bottom and pulls inward for opening.
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