A filter assembly for mounting on a conventional or ceiling fan blade includes a fan blade mount, a filter mount, and an air filter. The fan blade mount has a blade mount slot formed therein that is dimensioned to slidably engage a ceiling fan blade. The filter mount is coupled to the fan blade mount and has at least a portion thereof that is disposed substantially perpendicular thereto. The air filter is coupled to the filter mount and extends a distance therefrom in a direction perpendicular to at least a portion of the fan blade mount slot.