An evacuation device (1) for transporting gas and/or particles out of a room includes mounting elements (7, 9) for installation in a wall (3) of the room such that an inflow end (6) is located on the face of the wall (3) that faces the inside of the room and an outflow end (8) is located outside the room. The evacuation device includes a duct (2) extending between the inflow end and the outflow end, and a barrier (12) is releasably attached in the duct to seal it when the evacuation device is in a standby state. Driving elements (21) are arranged to guide at least one flow of fluid through the duct when the evacuation device is in an activated state. Preferably, the duct includes a venturi nozzle, and the driving elements include a number of water nozzles located upstream of the inflow end of the venturi nozzle.

A heat exchanger assembly includes a plurality of first and second fluid passages defined by a pair of opposing first fluid passage walls and a plurality of first fluid diverters disposed between the first fluid passages walls. The second fluid passages are defined by a pair of opposing second fluid passage walls and a plurality of second fluid diverters disposed between the second fluid passage walls. An ejector is integrated into the heat exchanger assembly. The ejector includes: an integral ejector passage, wherein the integral ejector passage is a first fluid passage; a primary inlet configured to receive a hot fluid; an outlet nozzle configured to eject the hot fluid; a secondary inlet configured to receive a cold fluid, wherein the secondary inlet is in fluid communication with a second fluid passage; and a mixing section in fluid communication with the outlet nozzle and the secondary inlet.

An evacuation device (1) for transporting gas and/or particles out of a room includes mounting elements (7, 9) for installation in a wall (3) of the room such that an inflow end (6) is located on the face of the wall (3) that faces the inside of the room and an outflow end (8) is located outside the room. The evacuation device includes a duct (2) extending between the inflow end and the outflow end, and a barrier (12) is releasably attached in the duct to seal it when the evacuation device is in a standby state. Driving elements (21) are arranged to guide at least one flow of fluid through the duct when the evacuation device is in an activated state. Preferably, the duct includes a venturi nozzle, and the driving elements include a number of water nozzles located upstream of the inflow end of the venturi nozzle.