Our most popular, this 17″ High Output Single RAD fan is a self-shrouded, symmetrical design with four molded mounting points. Motivated by a 2-speed 265 watt Bosch motor driving 11 patented skewed blades, each includes a patented ratchet mounting system for a professional installation. Can be used as a pusher or puller fan by simply flipping brackets without changing direction of the unit. Moves up to 2400 CFM while drawing up to 23.5 amps.