Rosenberg USA Backward Curved Fan N42-45012

N42-45012 is a backward-curved impeller for the Rosenberg E-Series EC fan, constructed from glass-fiber-reinforced polypropylene (PP), UV-stabilized and black, with seven backward-curled blades and a circumferential diffuser for volume-flow optimization. It is statically and dynamically balanced to DIN ISO 1940 quality level G2.5, as specified for impeller sizes 450 and above. The impeller is designed for use with EC motors and features a clockwise rotation when viewed from the inlet side. The inlet cone is made of galvanized steel sheet and is fluidically optimized. The nominal diameter does not necessarily correspond to the actual outer diameter. This part is compatible with the GKHM/C airflow monitoring and control system via the included ring measurement tube.