Double-hung windows open without blocking exterior space - ideal for openings on patios, walks or verandas. Windows open on the inside, so you can clean them from indoors. Set this windows at a right angle, and it's a double-slider.
1 Multiple weather stripping blocks air leaks for maximum
2 Multi-chamber system resists warping even in extreme conditions.
3 This design lets in the maximum light.
4 Fusion-welded corners seal out water and wind.