The Affordable Energy Saver

Common sense might tell you that if you reduce the speed of your swimming pool pump motor by one-half, the pump will pump half as much water while working half as hard. In fact, the pump will pump half the amount of water, but the load on the motor is reduced much, much faster or, more precisely, by the cube of the speed. Even though it takes twice as long to pump the same amount of water, the dramatic drop in the amount of horsepower required to do it saves a lot of electricity.