Patent ID: 8728212

Claim:
An air filter comprising: (a) a frame; and (b) a non-woven textile filter media disposed in the frame, the nonwoven textile filter media comprising longer fibers and shorter fibers, wherein the shorter fibers range from about 5 to about 55 mm in length and make up a majority of the nonwoven textile filter media and the longer fibers range from about 60 to about 100 mm in length and make up a minority of the nonwoven textile filter media, the longer fibers and shorter fibers comprise polyester fibers, wherein the non-woven textile filter media weighs from about 0.15 to about 0.35 ounces per square foot and has a thickness of from about 0.5 to about 2.5 cm, wherein the polyester fibers are mono-filaments and comprise a combination of about 1.5 denier fibers and about 4 denier fibers, and wherein a ratio of 1.5 to 4 denier fibers is from about 1:1 to about 1:4.