Rotating filtration cartridge and blower for HVAC applications

A filtration system that rotates in conjunction with a blower wheel, the blower wheel having a plurality of fan blades arranged in a spaced relationship radially around a blower cavity to define a flow path extending radially outward from the blower cavity through the fan blades when the blower wheel is rotating, the filtration system comprising:

• a filter cartridge releasably attachable to the blower wheel in an engaged configuration, the filter cartridge comprising a plurality of annular filter elements stacked to define a filter surface configured to be generally adjacent to the fan blades and to extend across at least a portion of the flow path when in the engaged configuration;
• and
• at least one retaining clip to retain the plurality of annular filter elements to the filter cartridge.

A filter cartridge comprising:

• a plurality of porous, discrete annular filter elements having substantially the same shape stacked concentrically to define an outer filter surface and an inner filter surface;
• and
• at least one retaining structure maintaining a generally concentric alignment of the annular filter elements in the filter cartridge wherein the discrete annular filter elements are arranged to have unimpeded flowpaths between the filter elements which flowpaths extend between the outer filter surface and the inner filter surface.