Since 1927, Hartzell has been a leader in the marketplace for high quality, industrial air movement systems. The first to build a heavy-duty industrial fan using an airfoil propeller blade, Hartzell has continued this tradition by having the broadest line of products in the industry. Featuring fans for general and process ventilation – including axial & centrifugal fans and blowers. Hartzell also offers an extensive fiberglass product line and a complete line of make-up air and heating equipment, including a complete range of options and accessories.