Abstract: A clean air cabinet is disclosed including a cabinet shell defining a cabinet interior. Internal walls including a ceiling, back wall and floor are disposed within the interior and define a work area. A first plenum connects a blower outlet with air passages formed through the ceiling. A first high efficiency particulate air (HEPA) filter is disposed within the first plenum. A second air plenum connects air passages formed in the floor with a blower inlet. A third plenum connects air passages formed in the work area back wall with an exhaust opening formed through the cabinet shell. A second HEPA filter is disposed within the third plenum.

Abstract: An animal station is disclosed having a housing defining an interior with first and second openings formed through the housing in air flow communication with the interior. A first filter medium (a prefilter) is disposed to filter particulate matter from air flowing through the first opening and a second filter medium (a HEPA filter) is disposed to filter particulate matter from air flowing through the second opening. The second filter medium is selected to filter particulate matter finer than that filtered by the first filter medium. At least one movable animal cage rack is provided disposed adjacent either of the first and second openings. The rack has an interior providing air flow communication between ambient air and the adjacent opening when the rack is positioned adjacent the housing. A blower is provided for drawing air through an inlet and forcing the air through an outlet.

Abstract: A work station is enclosed comprising a housing having first and second openings with first and second filter mediums disposed covering each of the first and second openings, respectively. The second filter medium is selected to filter particulate matter finer than that filtered by the first filter medium. A blower is provided with duct work for guiding air from the first filter media to the blower inlet and from the blower inlet to the second filter medium. A plurality of animal cages are positioned adjacent the first opening exterior of the housing. A curtain encloses a work area on a side of the housing in air flow communication with the first opening and air is directed from the second opening into the work area.