This Series 150 RELIABILT window is a popular choice for new construction and remodeling projects. Featuring a brick mould exterior, it can effortlessly complement any home's style. The window is designed for easy installation using a pre-punched, integrated nail fin and J-channel (Series 160 does not include a J-channel). Its bottom sash tilts and operates smoothly thanks to an integrated full-length slim-line lift rail and block and tackle balance system. With a DP-50 rating, this window offers superior performance. It also includes Low-E glass and Argon insulating gas for improved thermal efficiency. Please note, ENERGY STAR qualifications may vary by zone (refer to each window's U-Value and SHGC value for precise specifications). Finally, this window features a 5/8-inch contoured grid pattern between the glass panes, adding style to your home without the hassle of cleaning grids on the outside.