A filter (12) has a resiliently compressible thermally and chemically resistive combined unitary frame and gasket member (22) extending along its perimeter (18) and supporting a filter media element (16) and sealed to both the filter media element and the housing (20). One or more flange portions (34, 72, 94, 96, 118, 130) have one or more hollow channels (36, 74, 90, 92, 120, 132) deformed by engagement with the housing and reducing required closure force of the housing thereagainst.