Keep your range hood operating at peak performance with the RLSM65 aluminum filter. This filter is used in ducted applications to capture grease and particulates generated during cooking. Replace or clean your filter every 6 months, or more often if your cooking style generates extra grease. Broan NuTone Genuine replacement filter is designed, tested, and certified to fit the following series of range hoods: Broan CM, BP, and GP Series; NuTone RL and SM Series; Kenmore 31022, 31812, 31822, 31827, 31812; Aira HFRM Filter dimensions: 11-1/4" x 8-1/2"  Includes (1) aluminum washable filter Replace or clean every 6 months or more often if your cooking style generates extra grease