Never attempt to drill orifices

What is the tolerance of this unit

This centrifugal extract fan is engineered to meet the exact mechanical requirements of the Wilbur Curtis WC-37123

Low Pressure Drop: Large-diameter copper heat exchanger piping ensures maximum flow with minimal energy loss

Utica-Dunkirk 12100105000181 Fan 322056-301 Never attempt to drill orificesThe Utica Dunkirk 12100105000181 Fan is a critical OEM replacement part engineered specifically for SZ1H18 and MZ2H18 condenser units. As a high static condenser fan motor assembly, this component is vital for maintaining the thermal exchange efficiency of your Utica boiler or Dunkirk heating system. Integrated with IV Fan Cond specifications, it ensures targeted airflow management, preventing compressor overheating and high pressure cutouts during