An odor-removing trap system for removal of noxious gases emanating from cat litter boxes. The present invention provides an apparatus including an enclosure for capturing, filtering and removing noxious gases associated with cat waste products. Such gases rise upwardly within the enclosure wherein the gases are trapped and drawn from the enclosure. In one embodiment the gases are urged into an exhaust conduit disposed in fluid (i.e. air) transfer communication with the enclosure and flow to the exterior of the building by convection, air pressure or by vacuum created by a brushless fan motor. Such fan motor is powered by a battery pack or, alternatively, is electrically connected to an AC power source and can be actuated automatically by a motion detector whenever a cat enters the enclosure. In alternative embodiments the noxious gases are drawn through an air filter assembly including an activated charcoal filter element and absorbed therein.
