Patent ID: 8556570

Claim:
A fan assembly for removing smoke and fumes, the assembly comprising: a housing having an air inlet and an air outlet; and a fan inside the housing, the fan covered by the housing, the housing having a first suction aperture and a second suction aperture, the first and second suction apertures in communication with an internal space of the housing, the first and second suction apertures having different suction characteristics, wherein the fan and housing are configured to provide suction from at least one of the first suction aperture and the second suction aperture, wherein the housing comprises a casing and an air guide, the air inlet and the air outlet formed in the casing, the air inlet being on an inlet side of the casing, the casing covers the fan, the air guide connected to a peripheral edge of the inlet side, the first suction aperture and the second suction aperture formed in the air guide, the internal space disposed in the air guide, wherein the air guide includes a bottom wall partially separating the first suction aperture and the second suction aperture, the bottom wall has a constriction aperture that constricts an air flow path from the second suction aperture to the air inlet.