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 ...

Full modulation and cam trim adjustment provide optimum performance to meet load demand. A backward-curved impeller ensures adequate combustion air for exceptional performance at various... [See More] ...

Full modulation and cam trim adjustment provide optimum performance to meet load demand. A backward-curved impeller ensures adequate combustion air for exceptional performance at various... [See More] ...

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. CHARLOTTE, N.C., Dec.