Clean Air. Quietly.
An extremely good option for retrofitting, the ENERVEX Modulating Building Exhaust System™ (MBES) is a demand-controlled ventilation system designed for multi-story buildings that have kitchen hoods, bathrooms or clothes dryers on multiple floors.
Rather than operating at full speed 24/7, the MBES senses when no appliances are running and kicks into a very low speed. Once the appliance starts, the internal appliance fan creates pressure inside the duct, causing the fan to speed up. 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 BEF fan is equipped with a highly efficient EC-motor.