Abstract: A filter element having a frame defining an interior volume and having exterior surfaces. Filter media is mounted within the frame so as to allow fluid to enter an upstream side of the media and exit a downstream side of the media. At least one component of a multi-component filter frame seal, the at least one component being positioned on an outer surface of the frame and substantially circumscribing the filter frame at a location selected to align to a complementary component of the multi-component filter frame seal. The complementary component is provided separately from the filter element.

Abstract: A filter element having a frame defining an interior volume and having exterior surfaces. Filter media is mounted within the frame so as to allow fluid to enter an upstream side of the media and exit a downstream side of the media. At least one component of a multi-component filter frame seal, the at least one component being positioned on an outer surface of the frame and substantially circumscribing the filter frame at a location selected to align to a complementary component of the multi-component filter frame seal. The complementary component is provided separately from the filter element.

Abstract: A composite filter media having excellent dust-releasing properties provided with a first layer of non-woven synthetic fibers having one outer surface hot calendered to increase smoothness and carrying a coating of a hydrophobic material which lowers surface tension and at least a second layer of non-woven synthetic fibers laminated to the downstream side of said first layer. A backing layer may be included to provide additional support to the first and second layer if desired. The second layer may include an electrostatic charge to increase filter efficiency at a reduced pressure drop across the composite media.