Bio-Guard Furnace Filter

Abstract

An air filtering device for placement within an air duct for a residential furnace or air conditioning unit to provide at least MERV 13, preferably MERV 15, and most preferably MERV 17 efficiency. The air filtering device includes a frame which houses a filtering area having several stacked layers for removing particles from air before it is heated or cooled and then directed into air ducts for delivery throughout a building.

What is claimed is: 
     
         1 . An air filtering device for use in residential HVAC ductwork in cooperation with at least one of a furnace, an air conditioning unit, and a fan, the air filtering device comprising:
 a frame having four sides defining a periphery of the air filtering device;   a first face and a second face opposite the first face, each of the first and second faces having a surface area defined by the periphery; and   a plurality of distinct filtering areas positioned within the frame and extending from the first face to the second face;   wherein the filtering areas have an efficiency of at least MERV 13.   
     
     
         2 . The air filtering device of  claim 1 , wherein the filtering areas are washable. 
     
     
         3 . The air filtering device of  claim 2 , wherein the filtering areas are reusable. 
     
     
         4 . The air filtering device of  claim 1 , wherein the plurality of filtering areas comprises at least a pre-filter layer, a catalyst filter layer, an activated carbon filter layer, and an electrostatic filter layer. 
     
     
         5 . The air filtering device of  claim 1 , wherein height and length dimensions of the frame are approximately 16 inches by 25 inches, respectively. 
     
     
         6 . The air filtering device of  claim 1 , wherein height and length dimensions of the frame are approximately 20 inches by 25 inches, respectively. 
     
     
         7 . The air filtering device of  claim 5 , wherein a width dimension of the filtering area is at least four inches. 
     
     
         8 . The air filtering device of  claim 5 , wherein a width dimension of the filtering area is at least five inches. 
     
     
         9 . The air filtering device of  claim 5 , wherein a width dimension of the filtering area is at least seven inches. 
     
     
         10 . The air filtering device of  claim 6 , wherein a width dimension of the filtering area is at least four inches. 
     
     
         11 . The air filtering device of  claim 6 , wherein a width dimension of the filtering area is at least five inches. 
     
     
         12 . The air filtering device of  claim 6 , wherein a width dimension of the filtering area is at least seven inches. 
     
     
         13 . An air filtering device for use in residential HVAC air duct in cooperation with at least one of a furnace, an air conditioning unit, and a fan/blower, the air filtering device comprising:
 a frame having four sides defining a periphery of the air filtering device;   a first face and a second face opposite the first face, each of the first and second faces having a surface area defined by the periphery; and   a plurality of distinct filtering areas positioned within the frame and extending from the first face to the second face;   wherein the filtering areas have an efficiency of at least MERV 15.   
     
     
         14 . The air filtering device of  claim 13 , wherein the filtering areas are washable. 
     
     
         15 . The air filtering device of  claim 14 , wherein the filtering areas are reusable. 
     
     
         16 . The air filtering device of  claim 13 , wherein the plurality of filtering areas comprises at least a pre-filter layer, a catalyst filter layer, and two electrostatic filter layers.