Air filter arrangement; assembly; and, methods

An air filter cartridge comprising:

• (a) a filter media pack having first and second, opposite, flow faces, and having an axial direction extending from the first flow face to the second flow face;
• (i) the filter media pack comprising sets of axially extending flow channels, wherein a set of axially extending flow channels is located between axially extending sheets of media, and at least one of the axially extending sheets of media comprises fold lines forming the set of axially extending flow channels;
• (ii) the first and second, opposite, flow faces being generally planar and parallel to one another;
• and (iii) the media pack having a shape with:
• a first cross-dimension perpendicular to a direction between the first and second, opposite, flow faces;
• and, a second cross-dimension, perpendicular to a direction between the first and second, opposite, flow faces and also perpendicular to the first cross-dimension;
• and,
• (b) a housing seal arrangement comprising a perimeter seal extending around the media pack;
• (i) the housing seal arrangement including a pinch seal;
• (ii) the pinch seal having a first, end, pinch seal surface in complete extension around the media pack;
• (A) the first, end, pinch seal surface being an end surface facing generally in the same direction as one of the first flow face and second flow face;
• and,
• (B) the housing seal arrangement being configured such that a portion of the first, end, pinch seal surface, in extension in a direction corresponding to the first cross-dimension, varies in distance from the second flow face, in at least selected locations.