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A high efficiency filter assembly having a generally rectangular pleated filter element with ends defined by the pleated edges of the element and sides defined by generally planar side edges of the element. The filter element is mounted in a generally rectangular housing formed by two pairs of oppos

A high efficiency filter assembly having a generally rectangular pleated filter element with ends defined by the pleated edges of the element and sides defined by generally planar side edges of the element. The filter element is mounted in a generally rectangular housing formed by two pairs of oppositely disposed frame members that are joined together. Each frame member has a planar base member and a pair of upright side member defining an open ended channel to receive the ends and sides of the filter element. At least one spacing member extends along the base portion to space the ends and sides of the filter element from the surface of the planar member. A dam member is provided at each end of one of the pairs of planar members to enclose the channel, and a sealant is disposed in the channel and the ends of the filter element are embedded in the sealant.

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A filter assembly comprising: A generally rectangular pleated filter element with opposite end edges defined by the pleated edges of said element and opposite side edges defined by the generally planar side edges of said element; a housing in which said filter is mounted, said housing having first a

A filter assembly comprising: A generally rectangular pleated filter element with opposite end edges defined by the pleated edges of said element and opposite side edges defined by the generally planar side edges of said element; a housing in which said filter is mounted, said housing having first and second pairs of oppositely disposed frame members, each of said first pair of frame members comprising a generally planar base member and a pair of upright members defining a channel for receiving one of said end edges of said filter element, means for spacing said filter element from the surface of said planar member, and a means disposed at each end of said planar member for retaining a sealant in a viscous state within said channel during assembly, each of said second pair of frame members comprising a generally planar base member and a pair of upright members defining a channel for receiving one of said side edges; sealant means disposed within said channels for bonding said filter element to said frame members and sealing the interface between said filter element and said frame members; means for joining said frame members together to form a generally rectangular housing.