A ventilation unit and controller device comprises aventilation unit with a housing. The housing has an intakeport permitting flow of gas into.the housing and an exhaustport permitting flow of gas out of the housing. Within thehousing, a motorized fan is positioned to direct gas into thehousing via the intake port and out of the housing via theexhaust port. A controller capable of controlling theventilation unit communicates with a sensor capable ofdetecting an environmental stimulus. A source of electriccurrent provides power to the ventilation unit and controllerdevice. The device further comprises a switch capable ofinterrupting the electric current that powers the device. Thedevice is capable of being removably attached via fasteners toan arc flash hood, and the arc flash hood comprises aventilation opening to permit gas discharged by the device toenter the arc flash hood.
