06/19/2026
Double-hung windows are common for a reason.
They fit a wide range of home styles, open from the top or bottom, and offer tilt-in cleaning for easier maintenance. The OKNA Eco-Pro 600 double-hung adds energy-focused details like a welded uPVC frame, insulated glass, HeatSeal warm edge spacer technology, triple weatherstripping, and a slim profile designed to help preserve visible glass area.
A classic window style, with more going on than most people realize.