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A fan that moves the right CFM on a catalog page can still underperform once it is connected to louvers, ductwork, hoods, filters, and a building under negative pressure. Aerovent Exhaust Fans for Industrial Building applications should be selected as part of an air-moving system, not as an isolated piece of equipment. That distinction affects worker comfort, heat removal, contaminant capture, energy consumption, and the service life of the fan motor. Start With the Actual Airflow Problem Indust …