Profile: J M C Ventilation & Refrigeration, LLC specializes in ventilation and refrigeration system. Our product line includes storage fans, fresh air doors, exhaust doors, evaporators and humidifiers. Our fans are constructed of standardized fan frames for both 48" and 54" props. The props are available in both aluminum and polypropylene styles. Our centrifugal humidifiers maintains the humidity levels. These humidifiers are powered by a single motor spinning a disk and atomizing water on stationary teeth which results in very efficient humidification.