Filter cartridge arrangements, features thereof and assembly for use therewith, are provided. Selected filter cartridge features are disclosed. Methods of assembly and systems for use are described.

A filter cartridge includes an open-ended housing and filter element supported in the housing and defining an annular region between a periphery of the filter element and a side housing wall. A water collection region is between an end of the filter element and a lower-housing wall. The filter element includes pleated media surrounding an axially-extending central area, and pleats of different heights round the central area. An end plate is bonded to the filter element to prevent fluid flow through the pleats' upper ends. One passage is through a plate opening into the central area. Another passage is between the end plate and peripheral region. The filter element has freely-supported lower ends. A seal between the lower periphery of the filter element and the housing prevents fluid bypass of the filter element. Fluid passes through the pleats, and water coalesces on the media and drains into the collection region.

An air filter that includes a filtration material having at least one surface, an enclosed frame surrounding said filter material but exposing said one surface, said filter material having intermittent geometric shapes of latex on said at least one surface, said latex containing an enhanced additive.

The present disclosure relates generally to air intake filter assemblies, and more particularly to air intake assemblies for an outdoor portion of a heating, ventilation, and/or air conditioning (HVAC) system. In an embodiment, a filter assembly is configured to filter an airflow entering an air intake of a HVAC unit. The filter assembly includes a first layer of a first coarse mesh, a second layer of a second coarse mesh, and a fine filter disposed between the first layer and the second layer. Additionally, the fine filter includes an upper level and a lower level with respect to the airflow, and wherein the lower level facilitates accumulation of fine debris captured from the airflow entering the air intake of the HVAC unit.

A filter assembly including: a first filter medium that is bent so that high-point portions and low-point portions defined based on a vertical plane with respect to a first direction are alternately and repeatedly formed in a second direction perpendicular to the first direction; a first filter frame configured to accommodate the first filter medium and to fix an edge side of the first filter medium; a second filter medium that is bent so that the low-point portions and the high-point portions based on the vertical plane with respect to the first direction are alternately and repeatedly formed in the second direction; and a second filter frame configured to accommodate the second filter medium and to fix an edge side of the second filter medium, wherein at least a portion of the high-point portions repeatedly formed in the first filter medium have different heights from those of the other high-point portions, and at least a portion of the low-point portions repeatedly formed in the second filter medium have different heights from those of the other low-point portions, and the first and second filter media are bent in such a way that a first filter medium high-point envelope connecting high points of the first filter medium and a second filter medium low-point envelope connecting low points of the second filter medium correspond to each other when viewed from a cross-section including the first direction and the second direction, and the first and second filter frames are combined with each other so that the first filter medium high-point envelope and the second filter medium low-point envelope face each other.

An air cleaner assembly includes a housing and a removable cover. A filter element is removably positioned in the housing. A two-part mating catch assembly includes a first part that is secured to the cover and a second part that is on one of the housing and the filter element. The first part and second part are positioned to releasable, mate when the filter element is operably mounted within the housing

A filter cartridge for a filter for filtration of a fluid has a prismatic basic shape with a base face and a top face arranged parallel to each other and each having a polygonal basic shape. The prismatic basic shape is provided with a first lateral face and a second lateral face neighboring the first lateral face, wherein the first lateral face is an inflow surface and is substantially positioned perpendicular to the neighboring second lateral face. The prismatic basic shape has a third lateral face that is an outflow surface and is positioned at an angle relative to the first lateral face, wherein the angle is greater than 10° and smaller than 80°. A filter with such a filter cartridge is disclosed.

Embodiments include an air filtration media element comprising a plurality of layers of fluted media, each layer comprising a facing sheet and a fluted sheet, the fluted sheet comprising a first plurality of flutes and a second plurality of flutes, the first and second plurality of flutes being arranged in a parallel flow configuration; wherein the first and second plurality of flutes exhibit regular repeating differences in flute shape, flute size, flute height, flute width, cross-flute area, or filter media.

An air filter media (10) including a pleated fibrous filtration web (8) with a first major side (2) that includes at least one sorbent-loaded area (26) in which sorbent particles (14) are present on a first major surface (25) of the pleated fibrous filtration web (8), at least some of the sorbent particles (14) being post-pleat-deposited sorbent particles.

A filter element has a filter medium with a plurality of successive folds arranged in a longitudinal direction from a first transverse side of the filter medium to a second transverse side of the filter medium. A fold height of the successive folds continuously decreases in the longitudinal direction. A fold width of the successive folds continuously decreases in the longitudinal direction. A filter device such as an air filter is provided with such a filter element.