Air filter arrangement; assembly; and methods

An air cleaner comprising:

• (a) a housing having an inlet section and an outer section;
• and,
• (b) a filter cartridge arrangement comprising:
• (i) a filter media pack comprising a stacked construction of individual strips of media each comprising a fluted sheet secured to facing sheet to define inlet and outlet flow channels extending between first and second, opposite, flow surfaces;
• (ii) a molded side panel arrangement comprising at least first and second, opposite, molded panels molded directly to, and in sealing coverage over, a first set of two opposite sides of the media pack defined by lead ends and tail ends of the strips of media;
• and,
• (iii) a housing seal arrangement molded-in-place on the filter cartridge arrangement;
• (iv) the filter media pack having a second set of two opposite sides each of which is at least partially not covered by the molded side panel arrangement.

A filter cartridge arrangement comprising:

• (a) a filter media pack comprising a stacked construction of individual strips of media each comprising a fluted sheet secured to facing sheet to define inlet and outlet flow channels extending between first and second, opposite, flow surfaces;
• (b) a molded side panel arrangement comprising at least first and second, opposite, molded panels molded directly to, and in sealing coverage over, a first set of two opposite sides of the media pack defined by lead ends and tail ends of the strips of media;
• (i) the molded side panel arrangement comprising two, opposite, molded panels each defining a first edge adjacent the first flow face and a second edge adjacent the second flow face;
• and,
• (ii) the first and second edges of the two, opposite, molded panels defining a projection/recess contour;
• and,
• (c) a housing seal arrangement molded in place on the filter cartridge arrangement;
• (i) the housing seal arrangement comprising a housing seal perimeter extension recessed from alignment with each edge.