Heat-recovery ventilation unit Airextube

The Airextube air make-up system can be used in all applications where the replacement of exhausted air is required due to general ventilation or local extraction. Without this air replacement the building is maintained under negative pressure, reducing the efficiency of exhaust fan and increasing infiltrations and draughts which make the work areas uncomfortable. The operation of the Airextube is very simple and consists in using the hot air stratified at the top of the building to preheat the cold air introduced before it reaches the work area. The result is a uniform temperature from the top to the bottom of the building. Because the top layer of warm air is usually not utilized, the make-up air can then be considered as "free air". This represents an important advantage over the conventional gas or electric make-up units; the initial cost of an Airextube as well as its operation cost are much lower. The Airextube is available in four different configurations allowing a wide variety of uses. This versatility permits the Airextube to cover every need of the industry. This unit has one motorized back-draught damper at the rear of the casing (damper X) that closes automatically when the unit stops operating to avoid any air infiltration. The fan and damper are operated by an on-off remote control if needed. This control can be easily interlocked with the evacuation fan controls.