An air filter includes a filter frame, a filter cloth, a plurality of wires, and one or more pulling elements directly attached to a surface of the filter frame. The air filter is characterized by an installed condition in which a majority portion of the air filter is disposed in a housing and an uninstalled condition in which another majority portion of the air filter is out of the housing. The one or more pulling elements facilitate a user's pulling the air filter out of the housing. The one or more pulling elements comprises a flap, a recess region, a thread, a split pin type pulling element, a patch, a loop, a letter L-shape dual hook tool, and a tool with a self lock tool. An other air filter is wider than a housing. A first member of a filter frame of the other air filter serves as a handle for a user to pull.