The RELIABILT 150 Series New Construction Single Hung Window with Grids Half Screen Included is a popular choice for both new construction and remodeling projects. It offers a brick mould exterior for a stylish look and is designed with a pre-punched, integrated nail fin and J-channel (Series 160 available without J-channel) for easy installation. The bottom sash has a slim-line lift rail and operates smoothly with a block and tackle balance system. This window is DP-50 rated and features Low-E glass with Argon insulating gas for improved thermal efficiency. Its 5/8-in contoured grid pattern between the glass panes adds a touch of style without the hassle of cleaning external grids. Check specific U-Value and SHGC values for ENERGY STAR qualifications in your area.