Republic RTAF Tube Axial Fans provide flow capacities up to 27,000 cfm in diameters ranging from 12" to 36". These powerful, direct drive fans feature welded and powder-coated steel bodies, spark-resistant impellers, and TEFC motors with a single point electrical connection. These industrial fans are maintenance free, designed for continuous operation, and ideal for a variety of applications including ventilation, heat removal, process air movement, and in-line duct boosters.