Patent ID: 9044700
Filing Date: 2015-06-02
Classification: B01D

Abstract:
1. An air filtering device comprising: a base having an air inlet and an air outlet; a fan functionally attached to said base, wherein said fan moves about 50 CFM to about 150 CFM of air through said air outlet with a total pressure within said device of about 4 to about 25 Pa and with a sound power between 35 and 50 dB(A) when said fan is activated; an air filter in air flow communication with said air outlet, wherein said air filter comprises a non-woven having a thickness between about 1 and about 3 mm, a density from about 20 kg/m a substantially air impermeable outer sleeve comprising a first open end, a second open end, and an air flow path therebetween, wherein said outer sleeve is in air flow communication with said air outlet and wherein said outer sleeve is releasably attached to said base at said first open end, and wherein said outer sleeve envelops said air filter around its longitudinal axis; wherein the exit velocity of a volume of air exiting said second open end of said outer sleeve is about 0.5 m/s to about 3.0 m/s when said device is activated.