Five sizes of Rosenberg backward curved fans are now available with 5.5 kW electronically commutated (EC) motors for greater power and efficiency. The new fans feature three-phase motors with nominal input voltages of 230V and 460V. They are 100% speed controllable and are CE, UL and RoHS approved.

Other features include closed motor protection class IP 44/54 for reliability in humid environments, and thermal contacts wired into windings for motor protection. Standard maintenance free ball bearings, closed on both sides, are sealed for life.

The range of sizes for the new KH Series fans includes 450 mm, 500 mm, 560 mm, 630 mm and 710 mm fans. They deliver up to seven inches of water gauge of static pressure or up to 14,000 CFM of airflow at free air, perfect for a wide range of HVAC and air movement applications.

Their highly efficient free-running impellers are made of saltwater-proof aluminum and are balanced according to quality class G 2.5, DIN/ISO 1940. The fans can be supplied as complete modules equipped with airflow optimized inlet cones. Module enclosures and inlet cones are made from galvanized sheet steel.

Rosenberg backward curved EC fans feature extended-life, low-temperature brushless DC motors that are controlled by maintenance-free electronic circuitry. Because of reduced mechanical content, electronically commutated (EC) Rosenberg fan motors run cooler and quieter.

Rosenberg backward curved fans can also be made to customer-defined specifications including airflow, power, rotational speeds, noise level, overall dimensions and finish.

About Rosenberg

The Rosenberg family of companies is headquartered in Künzelsau, Germany and employs more than 1,400 individuals worldwide. Rosenberg fans and blowers can be found in HVAC systems, as well as industrial and portable air conditioning; in air cooling for variable frequency drives (VFD), wind power generators and power converters, solar inverters, uninterruptable power supplies (UPS), transformers, heat sinks, fan coils, telecom racks and other industrial equipment; in air handling units and fan filter units (FFU); and in railway, marine, military and avionics equipment.

Rosenberg USA is located 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