The RELIABILT 105 Series New Construction single hung window, with its affordable price, offers excellent performance while staying within budget. The bottom sash can be removed easily with side-loading and operates using dual lift rails. This window is perfect for both new construction and remodeling projects, and comes with a pre-punched, integrated nail fin and built-in accessory channels, allowing for versatile installation options (Series 3050 available without nailing fin). With a DP-50 rating (Design Pressure rating), this window can handle up to 36-in W x 74-in H sizes. Its modular design also makes it easy to calculate rough opening widths for multiple units. Featuring Low-E glass to reflect solar energy and Argon insulating gas for superior thermal efficiency, this window may not qualify for ENERGY STAR in all zones (please refer to U-Value and SHGC values for specific specifications).