The RELIABILT 105 Series single hung window is the ideal choice for those seeking high performance on a tight budget. Its bottom sash is conveniently side-loaded for easy removal and is operated by dual lift rails. This window is perfect for both new construction and remodeling projects, with its pre-punched, integrated nail fin and built-in accessory channels that offer multiple installation options (nailing fin not available in Series 3050). It boasts a DP-50 rating (Design Pressure rating) for windows up to 36 inches in width and 74 inches in height. The modular sizing makes calculating rough opening widths for multiple units a breeze. Additionally, this window features Low-E glass to reflect solar energy and is insulated with Argon gas for enhanced thermal efficiency (Note: ENERGY STAR qualifications may vary by region; please refer to the U-Value and SHGC value for specific specifications).