Patent ID: 6623540
Filing Date: 2003-09-23
Classification: B01D,F24F,Y10S

Abstract:
A filter apparatus for deployment over a duct end in a forced air HVAC system, said filter apparatus comprising:a filter element; a frame; means for removably securing said filter element within said frame; a plenum within said frame; a bottom cover; means for movably securing said bottom cover to said frame; and means for securing said filter apparatus over said duct end; wherein:said frame comprises: left side, top and right side wall members, each wall member being generally angular in cross section and having a front flange and a side flange; a bottom face member; and an internal brace; said front flanges of said left side, top and right side wall members and said bottom face member are joined together, thereby defining a front face of said frame and an air passage through said apparatus; said side flanges of said left side, top and right side wall members and said internal brace are joined together, a left end of said internal brace being joined to a bottom end of said left side wall member and a right end of said internal brace being joined to a bottom end of said right side wall member, thereby defining a wall structure of said frame; said plenum is defined by rear edges and interior surfaces of said wall structure, extending forward to a rear surface of said filter element; and said filter element is sufficiently large to cover said air passage through said apparatus.