Choose Hartzell’s Series 69 Upblast Belt Drive Fan as a quiet, economical alternative to direct-drive exhaust fans for commercial and industrial roof ventilation. Its exterior motor mounting places the motor and belts out of the airstream, making the unit ideal for handling tempered air, smoke, dust and fumes.
This heavy-duty commercial exhaust fan is a three-piece unit including a belt drive duct fan mounted on a spun venturi panel with a stack cap backdraft damper. Able to be built with most of Hartzell’s tubeaxial fans, the Series 69 Upblast Fan offers the projection height needed to move air and exhaust fumes up and away from roofs and is designed to prevent entry of rain or snow during operation. Some configurations are available for shipment within 5 days, as part of the Rapid Ship family of products.
Available in sizes from 12" through 84", the Upblast roof ventilator provides flow rates of 1,455 to 117,000 CFM at free air. Its cast aluminum airfoil propellers are available in a variety of fixed and adjustable pitch blade configurations, including 6-blade Type W for 18"-48", 3-blade low-noise Type L for 54"-60", 4-blade adjustable Type BA for 66", and 4- and 6-blade adjustable Type A for 72"-84". The panel and fan are bolted together for ease of installation and maintenance, and sizes 44" and larger feature a rolled angle ring on top of the windband for additional support.
Standard models feature heavy-gauge, painted hot-rolled steel construction with continuously welded seams, and aluminum construction is also available. The standard finish is industrial-grade enamel suitable for interior or exterior industrial applications. Other coatings are available upon request. Optional accessories include an inspection door, disconnect switch, and combination motor cover and belt guard.