Eco-Pro | 600 Series
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Double Hung DH600
The Eco-Pro combines superb craftsmanship with a classic feel. This Series offers many glass and hardware options to seamlessly blend with any interior design while providing superior energy efficiency. Since all OKNA products are custom-made, you can be sure of a perfect fit every time.
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The Eco-Pro combines superb craftsmanship with a classic feel. This Series offers many glass and hardware options to seamlessly blend with any interior design while providing superior energy efficiency. Since all OKNA products are custom-made, you can be sure of a perfect fit every time.
learn more