Patent ID: 8562722

Claim:
A filter assembly for controlling the air passing therethrough, the filter assembly comprising: a housing comprising a cavity formed therein; a filter positioned within the cavity and coupled to the housing; and a reinforcement structure coupled to an end of the housing and to a top end of the filter, wherein the reinforcement structure comprises at least one rib extending inward from a perimeter of the reinforcement structure towards a center of the filter along the top end of the filter, wherein the at least one rib comprises: at least two contact points along a side of the at least one rib, wherein the at least two contact points contact the top end of the filter; and at least one elevated portion along the side of the at least one rib, wherein the at least one elevated portion is positioned between the at least two contact points, wherein the at least one elevated portion creates an air gap between the top end of the filter and the side of the at least one rib.