OKNA Windows and Doors
OKNA Insul-Tec – 500 Series – Double Hung
Of the many replacement window manufacturers we recommend, OKNA continues to stay at the top of our most popular and widely recommended list.

The Insul-Tec window replacement line merges craftsmanship and quality with an impressive look and feel. This series does offer all the same benefits you come to expect from vinyl windows in addition to wood, fiberglass, vinyl, and aluminum variations.

The OKNA Insul-Tec 500 Series – Double Hung is the best performing 2-pane glass window money can buy.

Key benefits to the OKNA Insul-Tec Series line of windows include mega-efficiency savings, enhanced beauty, custom-manufacturing to ensure a perfect snug fit and an installation labor cost savings passed on to you because they are so much easier to install with such perfect dimensions.

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