For industrial ventilation applications

5-inch rings

the Trane MOT18719 is an exact OEM part for systems requiring 120V and 1/2 HP at 1050 RPM

If you require the motor on the 24-inch side

and RDMH models

Loren Cook GC-140 Exhaust Fan 322055-301 For industrial ventilation applicationsThe Loren Cook GC 140 115V exhaust fan is a commercial grade ventilation solution designed for dependable air removal in HVAC exhaust and building ventilation systems. Built for continuous duty operation, this 115V centrifugal exhaust fan delivers consistent airflow performance for applications such as mechanical rooms, light industrial spaces, and general building exhaust. Engineered with durability in mind, the GC series is commonly used in HVAC