CHARLOTTE, NC – Rosenberg’s double-inlet forward-curved radial centrifugal AC fans deliver up to 7,200 CFM of air movement in critical cooling and ventilation applications such as wind power generation, clean rooms, commercial kitchens, food processing and railway air conditioning.

Designated the DRAE and DRAD series, they are often used for cooling generators and switchboards in modern wind energy plants and windmills. Rosenberg is the world’s leading supplier of cooling fans to the wind power industry.

These fans are available in sizes from 7 inches to 15.7 inches (180 mm to 400 mm). The size designation corresponds to the outside diameter of the drum impeller. The impeller is made of galvanized sheet steel.

The impeller is mounted directly to the rotor of the external rotor motor, which is 100% speed controllable, so noise and vibrations can be kept as low as possible. The impeller is balanced dynamically at two levels with the rotor according to quality level G2.5 to DIN1940. The casing is also made of galvanized steel.

These rugged, high-efficiency centrifugal fans comply with R20 standards. The outlet flange is in compliance with DIN323.

The asynchronous motors are protected by thermal contacts. Insulation is Class F. Protection is to IP54. The fans are also available featuring Electronically Commutated (EC) motor technology. The largest single inlet EC model (22 inches/560mm) delivers up to 7,600 CFM of air movement.

Rosenberg fans have been used in demanding applications around the globe since 1981 and are built to handle a wide range of requirements. In addition to standard products, Rosenberg’s engineering and manufacturing specialists offer application assistance and work directly with customers to provide customized solutions to their air movement problems. They are skilled at producing fans that match customers’ unique needs such as special finishes, voltages, or frequencies.

The Rosenberg family of companies employs more than 1,200 individuals worldwide. Rosenberg USA is headquartered just outside Charlotte in Indian Trail, N.C. For more information, or to place an order, contact Rosenberg USA by phone at (704) 893-0883; fax (704) 882-0755 or e-mail