The 3100 Series single hung window is a versatile and high-performing option for replacing windows in your home. With a contemporary and beveled exterior, it features an operable tilt-in bottom sash for easy maintenance. Designed for replacement, this window is DP-50 rated (Design Pressure rating) for windows up to 36-in W x 74-in H. It also comes with a head expander, sill angle, and 3 jamb adjusters for easy installation. The window's energy-efficient Low-E glass helps to reflect heat away in the summer and retain warmth in the winter. With a 5/8-in contoured grid pattern between the glass panes, this window adds style to your home without the added cleaning hassle of exterior grids.