Abstract: A modular high-efficiency particulate air (HEPA) filtration system includes first and second modular filtration units and a blower unit. The blower unit draws air from an isolated indoor space of a facility via a ventilation input to maintain negative air pressure within the isolated indoor space. The first modular filtration unit and the second modular filtration unit are connected in parallel with the ventilation input and the blower unit. The first modular filtration unit is disposed between the blower unit and the ventilation input and at least a portion of air drawn through the ventilation input by the blower unit passes through the first modular filtration unit, and the second modular filtration unit is disposed between the blower unit and the ventilation input and at least a portion of the air drawn through the ventilation input by the blower unit passes through the second modular filtration unit.

Abstract: A security cabinet of metal construction having first and second series of locking members inside of and adjacent respective opposite side edges of the cabinet door. An electrically operable latching device maintains the cabinet door in a locked closed position. For unlocking the door, an electronic control device is provided including a disguised control panel mounted on the outer face of the door and being electrically connected to the latching device. The disguised control panel has a visually hidden array of switches thereon arranged so that a predetermined preselected sequence of actuation of the switches effects actuation of the latching device for movement thereof from a latched position to an unlatched position for permitting retraction of locking members by manual movement of the handle on the door to thereby permit the door to the cabinet to be opened.

Abstract: A security cabinet for protecting one's valuables having a key actuatable locking means provided with an elongate locking bar for lockingly engaging with a door flange provided on the inner side of the door. Additional locking means are provided along the hinge side of the door in the form of an additional key actuatable locking bar or a series of internal locking pins carried by the door and cooperating with cutouts provided in the surrounding door-jamb or frame.