This product family of hung windows retains an AAMA Heavy Commercial rating to meet the most demanding specifications and is designed for projects ranging from historical replication to new construction. This hung window series is an attractive and economical product for a wide range of applications. Multiple glazing options offer flexibility to meet specific design requirements, with a removable putty glaze frame and snap-in-grid outside of the glazing pocket. A thermal barrier in the frame and sash improves thermal performance enhancing energy saving potential. Offered with a complete line of sub frames, mullions and architectural sills, this product family provides the complete solution for fenestration needs.