Bosch DHU635HZA 60cm CookerhoodDucted and recirculation hoods require metal grease filters to filter grease and other solid particles out of the extracted air. To keep these filters operating at maximum efficiency, clean them about once a month either by hand or in the dishwasher. The LED lights provides energy efficient lighting for the below hob so you can clearly see while cooking. Ducted and recirculation hoods require metal grease filters to filter grease and other solid