Patent ID: 8119012

Claim:
A filter comprising: (a) a housing having an inlet and an outlet; and (b) a filter material disposed within the housing, the filter material comprising: (i) from about 25% to about 75%, by weight, of a plurality of filter particles comprising microporous activated carbon, wherein the sum of the mesopore and macropore volumes of the filter particles is less than 0.12 mL/g, and wherein mesopore means an intra-particle pore having a diameter between 2 nm and 50 nm, and macropore means an intra-particle pore having a diameter greater than 50 nm, and (ii) from about 25% to about 75%, by weight, of a plurality of filter particles comprising mesoporous wood activated carbon, wherein: A. the sum of the mesopore and macropore volumes of the plurality filter particles comprising mesoporous wood activated carbon is between about 0.2 mL/g and about 2 mL/g, wherein mesopore means an intra-particles pore having a diameter between 2 nm and 50 nm, and macropore means an intra-particle pore having a diameter greater than 50 nm, and B. the ratio of the sum of the sum of the mesopore and macropore volumes to the total pore volume of the plurality of filter particles comprising mesoporous wood activated carbon is greater than about 0.3; wherein the filter has a Filter Bacteria Log Removal of greater than about 2 logs and a Filter Viruses Log Removal of greater than 1 log.