The ENERVEX Modulating Building Exhaust System™ (MBESx) is a demand-controlled ventilation system designed for multi-story buildings with multiple kitchen hoods, bathrooms or clothes dryers on multiple floors.
Rather than having a large numbder of individual exhaust ducts for each appliance, or a fan that operates at full speed 24/7, the MBESx senses when appliances are running and modulates with the load. It assures proper exhaust rates at any time no matter the demand. Can reduce the exhaust rate of conditioned air by up to 60-70%. In addition the BEFx fan is ultra-efficient with high-efficiency housing design and a IE5 highly-efficient EC-motor.
The MBESx system consists of a BEFx Exhaust Fan and an MEC 24 Constant Pressure Controller with an XTP Pressure Transducer. The system uses an EC-motor and an MSC EDrive E3 Motor Speed Controller.
The MEC 24 control modulates the speed of the BEFx ventilator based on the ventilation demands of the building to maintain the set-point during normal operation. The MBESx ensures the set-point is reached within 30 seconds of system start-up and is maintained with a tolerance of 0.01” W.C.
When a number of clothes dryer, kitchen or bathroom exhausts are connected into a common duct, the MBESx will modulate with the load. Once an appliance starts up, the pressure will change in the common duct and the MBESx will react by increasing speed and vice versa.
During normal operation, ramp-up and ramp-down time of the fan will be no more than 20 seconds. In the case of a mechanical or electrical failure, the control goes into alarm and sets the ventilator to run at 100% speed. If connected, the alarm signal will be sent to the Building Management System.
Multi-use, high performing, variable-volume centrifugal exhaust box fan designed for indoor and outdoor installation. Can be used for special exhaust or exhaust of lint-laden air or to supply make-up air and combustion air.
A modulating pressure control that provides superior pressure control in single- or multi-story building applications such as clothes dryers, bathrooms and kitchens.