Activated Carbon Range Hood Filter AMERICAN METAL FILTER RCP0803 POLYSORB CARBON RANGE HOOD FILTER. SIZE: 8-1/4 X 11-1/4 X 3/8, PT CTR, LS. FUNCTION: FILTERS COOKING ODORS. APPLICATIONS: DUCTLESS KITCHEN RANGE HOOD. DUCTLESS RANGE HOOD FILTERS EXHAUST THE AIR BACK INTO THE KITCHEN ENVIRONMENT. THAT IS WHY A CARBON FILTER