The ESP unit bearing 4-pole motor is not just another motor. The special eccentrically wound design means higher operating efficiency in a shaded-pole design. These motors have proved to be more than a match for some capacitor-run motors and up to 50% more efficient than traditionally designed shaded pole types. This results in the less heat, longer motor life, quieter operation, and less operating cost per unit of output.
The unique cast iron bearing and hardened shaft add years of life expectancy over ordinary unit bearing motors.