Sash window 400

woodendouble-glazedEnergy Star

Double-hung windows have two sash in a single frame which slide up or down to provide ventilation. Because their sash remain flush with the wall while the window is open, they are a good choice for placement adjacent to patios, decks and walkways. Our best-selling double-hung window, the Andersen® 400 Series tilt-wash double-hung window is extremely energy efficient and gives you a wide array of decorative and performance options, including Stormwatch® protection.