Abstract: A grease collector housing is mounted directly atop a filter-containing kitchen exhaust hood at the exhaust collar. The housing includes a liquid reservoir at the bottom, a 360 degree shallow conical spray head immediately above the reservoir, an array of baffle-type grease filters above the spray, a filter-cleaning spray head above the array and a connector above it to the exhaust duct. A detergent water supply and removal system includes a pump and associated valving for moving a water-based solution through the spray heads and sprays as and when needed to remove grease from kitchen exhaust fumes and to wash down any residual grease from the filters and reservoir in the housing. A disposable cartridge-type water filter is included in the recirculating liquid system. Controls automatically provide the proper valve operating sequence for the operations as and when needed.