Patent ID: 7789921

Claim:
A device for mitigating accumulation and localized settling of airborne particulates, comprising: a housing having an upper portion and a lower portion; the housing upper portion defining an air intake; and the housing lower portion defining an air outlet and having an outer periphery defined by at least one sidewall; a filter element removably attached to at least one of the housing upper and lower portions; and a fan assembly mounted within the housing and defining an axis of rotation that is generally vertically oriented, wherein the fan axially draws a volume of air downwardly through the housing upper portion and discharges the volume of air into the housing lower portion, where it is emitted through substantially the entire periphery of the housing lower portion; wherein the air outlet is configured such that the volume of air that is emitted by the air outlet is directed generally downwardly and radially from the housing to a surrounding surface so as to mitigate accumulation and localized settling of airborne particulates to the surrounding surface.