Northern Industrial Supply Company is your sole source for industrial and commercial heating, ventilation and air-conditioning (HVAC) equipment. High pressure blowers, industrial fans and ventilation. Humidifiers, Vibration Isolation, noise control, heating & cooling coils, OEM, High Temperature oven fans and blowers, centrifugal and axial blowers. Industrial Process Application & Air Knives. We offer engineered solutions, packaged fan, blowers, ventilators and custom industrial ventilating equipment.