Air filtration system with recessed filter and edge banding

The filtration system of claim 10, wherein the prefilter is attached to the frame by a clip mechanism.

A filtration system for use with a prefilter, the prefilter having a prefilter frame arranged in a rectangular configuration, the prefilter frame having a planar, outer downstream face, a prefilter filter media disposed within the prefilter frame, the filtration system comprising:

• a main frame having two opposed end walls and two opposed side walls arranged in a rectangular configuration, the end walls and side walls including upstream edge surfaces arranged in a rectangular configuration and forming a planar, upstream, outwardly facing rectangular face that conforms to the planar, outer downstream face of the prefilter frame members to abut against and in contact with the planar, outer downstream face of the prefilter assembly;
• and
• main filter media comprising sections arranged in a row of V shapes, each section extending longitudinally between the opposed end walls and in alignment with the opposed side walls, the main filter media fixedly retained within the main frame and spaced from the upstream face a distance sufficient to prevent blinding of the filter media by the prefilter and defining a recess between the main filter media and the upstream face, the recess being free of filter media.

A filtration system comprising:

• a frame having two opposed end walls and two opposed side walls arranged in a rectangular configuration, the end walls and side walls including edges that define a planar, outer upstream face configured for contacting abutment with a corresponding planar, downstream face of an upstream filter assembly;
• and
• filter media comprising sections arranged in a row of V shapes, each section extending longitudinally between the opposed end walls and in alignment with the opposed side walls, the filter media fixedly retained within the frame and spaced from the upstream face a distance sufficient to prevent blinding of the filter media by the upstream filter assembly abutting the upstream face of the frame, the end walls and the side walls extending above the filter media to fort a recess between the filter media and the upstream face, the recess being free of filter media.