Visions Windows & Doors Visions 3000 single hung units are certified at DP 50 lbs. per sq. ft. (apart from tempered glass use). The certification ensures that Visions 3000 single hung units will perform well under extreme wind pressure, because of the products' reinforced structure. Visions 3000 single hung windows combine the look of wood windows with no-maintenance premium vinyl. These windows are constructed with fusion-welded corners, replacing unsightly squared-off appearances or overlapping frame and sash sections.