"The TPI tubeaxial direct fan is custom-built and features a totally enclosed, explosion-proof motor for trouble-free operation. U.S.A. Fans are made to order and are non-returnable unless there is a warranty/quality issue contact your Northern Tool representative toll-free @ 1-800-221-0516. Air Delivery CFM 28,600, Volts 230v, Fan Diameter in. 48, Product Style Stationary. Totally enclosed, explosion-proof motor for trouble-free operation Motors are Class 1, Division 1, Group D and Class 2, Division 1, Group F & G Fan can be mounted in any position, including duct mounting 14-gauge tube construction for rigidity Rugged cast aluminum non-sparking blades Fan is set to lower voltage 230V unless specified at time of order but can be field converted to 460V"
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