Grease filters should be replaced regularlyAs the filters trap the grease from the air they will become blocked over timeIf the filters are filled with greasy residue your cooker hood won't work as efficientlyDimensions 319 x 272 x 9mmPlease check below for the list of compatible cooker hoodsImage for illustration purposes only Grease filter compatible with;Models requiring 3 grease filters . eiQ90CHIMNEYSS . eiQ90CHIMNEYBL . eiQ90TOUCHSLIMHEA