A method and a device for filtering polluted air, in which the air is
successively subjected to the processes of extracting grease/fat and
water, drying air still containing residual humidity, and adsorbing
smells/odors. The filter device includes, in a direction of flow a vortex
filter, layers of expanded metal, a filter for drying the air, and an odor
filter, all in a filter housing. The filter for drying the air and the
odor filter are, preferably, combined in a filter cassette that is
disposed on the filter housing such that it can be changed/replaced.
