The OKNA 400 Series is an excellent value when making the choice to replace windows in your home. The 400 Series offers clean, modern lines, high-quality craftsmanship, and many options to beautify your home while making it energy efficient. Since all OKNA products are custom-made, you can be sure of a perfect fit which translates to savings on time and labor during installation.

    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.
    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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