An air filter cartridge (340, 540, 735) comprising: (a) an air filter cartridge housing (342, 600, 744); and, (b) a media pack (315, 515, 630, 745) non-removably secured within the filter cartridge housing (342, 600, 744); (i) the media pack (315, 515, 630, 745) being closed to passage of unfiltered air through the media pack (315, 515, 630, 745), without passage through media therein; the media pack (315, 515, 630, 745) having an inlet flow face (316, 631, 746) and an opposite outlet flow face (317, 632, 747), the media pack (315, 515, 630, 745) being oriented with the inlet flow face (316, 631, 746) directed in alignment with an inlet end of the air filter cartridge (340, 540, 735); and, (c) the filter cartridge housing (342, 600, 744) including: (i) a shell member defining a filter cartridge clean air volume adjacent an outlet flow face (317, 632, 747) of the media pack (315, 515, 630, 745); a closed end portion of the shell member defining the filter cartridge clean air volume; (ii) a first end member extending along a media pack (315, 515, 630, 745) first side and having a filter cartridge air flow outlet arrangement therethrough, in communication with the filter cartridge clean air volume; and, (iii) a second end member extending along a media pack (315, 515, 630, 745) second side. (a) an air filter cartridge housing (342, 600, 744); and, (b) a media pack (315, 515, 630, 745) non-removably secured within the filter cartridge housing (342, 600, 744); (i) the media pack (315, 515, 630, 745) being closed to passage of unfiltered air through the media pack (315, 515, 630, 745), without passage through media therein; the media pack (315, 515, 630, 745) having an inlet flow face (316, 631, 746) and an opposite outlet flow face (317, 632, 747), the media pack (315, 515, 630, 745) being oriented with the inlet flow face (316, 631, 746) directed in alignment with an inlet end of the air filter cartridge (340, 540, 735); and, (i) the media pack (315, 515, 630, 745) being closed to passage of unfiltered air through the media pack (315, 515, 630, 745), without passage through media therein; the media pack (315, 515, 630, 745) having an inlet flow face (316, 631, 746) and an opposite outlet flow face (317, 632, 747), the media pack (315, 515, 630, 745) being oriented with the inlet flow face (316, 631, 746) directed in alignment with an inlet end of the air filter cartridge (340, 540, 735); and, (c) the filter cartridge housing (342, 600, 744) including: (i) a shell member defining a filter cartridge clean air volume adjacent an outlet flow face (317, 632, 747) of the media pack (315, 515, 630, 745); a closed end portion of the shell member defining the filter cartridge clean air volume; (ii) a first end member extending along a media pack (315, 515, 630, 745) first side and having a filter cartridge air flow outlet arrangement therethrough, in communication with the filter cartridge clean air volume; and, (iii) a second end member extending along a media pack (315, 515, 630, 745) second side. (i) a shell member defining a filter cartridge clean air volume adjacent an outlet flow face (317, 632, 747) of the media pack (315, 515, 630, 745); a closed end portion of the shell member defining the filter cartridge clean air volume; a closed end portion of the shell member defining the filter cartridge clean air volume; (ii) a first end member extending along a media pack (315, 515, 630, 745) first side and having a filter cartridge air flow outlet arrangement therethrough, in communication with the filter cartridge clean air volume; and, (iii) a second end member extending along a media pack (315, 515, 630, 745) second side.