Honeywell International Inc.

Honeywell G.m.b.h.

Joseph A Mack

Brad Alan Terlson

Edward L Schwarz

Wallace Ronald Saldin

An air duct has a filter mount opening originally intended to accept a shallow filter element for filtering air entering the duct. The opening has an interior flange whose original purpose was to support the shallow filter element. This flange has interior edges defining an air passage opening. The invention is implemented a filter unit including a frame and a deep filter element mounted in the frame. The frame has dimensions allowing the filter unit to replace the conventional shallow filter element with the frame inserted into the air passage opening and closely spaced to all of the interior edges. A resilient gasket is mounted adjacent to the opening's interior flange and projects slightly into the air passage opening so as to contact the deep filter element's frame. The gasket prevents air leakage between the interior flange's interior edges and the frame. In one embodiment, the frame has a flange to mate with a surface of the air passage opening's interior flange so as to prevent air leakage and to position and support the filter unit.

Air plenum filter sealing system

A frame supports a deep filter element to allow the filter element to be installed in a duct's conventional air intake opening as a replacement for a conventional shallow filter element. The frame has a flange to mate with a surface of the intake opening's interior flange. In one embodiment, two identical side panels are assembled with the relatively stiff end panels of a particular filter element to form the frame.

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Phoenix, AZ, United States of America

Joseph A Mack