New Rosenberg I-Series impeller design increases airflow and efficiency, cuts noise by half

Rosenberg’s new high-efficiency, high-volume I-impeller fan 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 increases efficiencies by up to 11% while reducing noise levels by more than half compared to older impellers.