Patent ID: 8491684

Claim:
An air filter cartridge comprising: (a) a media pack having first and second opposite flow faces; (i) the media pack comprising a stack of strips of single facer filter media material, each strip including a fluted media sheet secured to a facing media sheet and oriented with flutes of each fluted sheet extending in a direction between the first and second, opposite, flow faces; (ii) the first flow face comprising a planar inlet flow face with a non-rectangular perimeter shape; (b) seal gasket extending around the media pack; and (c) a mounting bracket arrangement secured to the media pack defining at least one fastener socket to allow mounting of the filter cartridge to a tube sheet; the mounting bracket arrangement including a plurality of flanges; each of the flanges being linearly spaced from each other; and at least one of the flanges being spaced radially from at least one other in the plurality.