The new Rosenberg CEI model 575V EC motor, operating at up to 7.4 kW, is our most powerful EC fan motor to date. It is now available in a 500-mm plug fan module, paired with our 2025 AHR Innovation-award-winning I-Series backward-curved impeller. The new fan, Model N88-50709, delivers 8,000 CFM airflow and 5 inWG of pressure with only 88 dB(A) noise. At free air, maximum airflow is approximately 12,000 CFM.
The N88-50709 provides high-efficiency, high-volume air movement, precise control, and energy savings that are ideal for applications like industrial HVAC systems, refrigeration units, and data centers.
The new Gen 3+ EC motor operates at consistently high efficiency, even in partial load ranges. It is compatible with AC voltage inputs from 460V to 600. Fan speed is infinitely adjustable.
The I-Series impeller design features five backward-curved, hollow-profiled, airfoil section aluminum blades, with an efficiency-optimized circumferential diffuser. Depending on fan size and operating point, the new impeller boosts efficiency by up to 11% and cuts noise levels by more than half compared to older impellers.
Like all Rosenberg EC plug fans, the new model N88-50709 features low installation depth, easy integration, and maintenance-free operation thanks to its cool-running EC motor and lifetime lubricated ball bearings.
For more information, or to place an order, contact Rosenberg USA by phone at (704) 893-0883; fax (704) 882-0755 or e-mail sales@rosenbergusa.com.
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.
