AHR Expo and its co-sponsors, ASHRAE and AHRI, have chosen the Rosenberg I-Series Backward Curved Fan as the WINNER in the Ventilation Category of the 2025 AHR Innovation Awards.
The award-winning Rosenberg I-Series impeller EC fan increases airflow and energy efficiency, while greatly reducing noise. The I-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.
I-Series blades are positioned diagonally and top-flared so that airflow direction is optimized for the highest efficiency and flow rates. The new design significantly reduces the turbulent downstream air produced by traditional backward-curved impellers. The effect of this reduction is to significantly reduce noise and increase in-application efficiency.
The I-impeller is statically and dynamically balanced according to DIN ISO 21940. Noise levels range from a high of just 89 dB to a low of 68 dB while moving up to 12% more air than earlier models.
I-Series fans are available with Rosenberg Gen3 and Gen3+ EC motors operating at up to 7.2 kW of power input. All I-Series fans are AMCA Certified for sound and air movement performance.
Find out more. Download the specs now. Contact Rosenberg USA for detailed technical data. Call (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.