The Imperial 1127 Fan Switch SPDT 7/8" x 1-1/2" is designed to regulate fan operation efficiently by controlling electrical flow within heating or cooling systems. This single pole double throw (SPDT) switch functions by activating or deactivating the fan motor based on system requirements, ensuring optimal air circulation and temperature balance. Built with a compact 7/8" x 1-1/2" de... https://partsfe.ca/fan-switch78-x-1-12-spdt-for-imperial-part-1127