Frequently Asked Questions
A variable speed pool pump, also known as a variable frequency drive (VFD) pump, can operate at a wide range of speeds in revolutions per minute or flow rates in gallons per minute. Variable speed pumps save tremendous amounts of energy by circulating pool water only at the required speed to get the job done.
Traditional single speed pool pumps operate at a single speed: 3,450 RPM. A variable speed pump, which typically includes a brushless DC permanent magnet motor, can operate at a range from 450 RPM on some models up to 3,450 RPM. Most variable speed pumps are 2-3 horsepower, but can replace much smaller pumps because they can run at essentially any speed.
Savings come from operating the pump at a lower speed, but perhaps for longer periods of time. The physics of a centrifugal pump, known as Affinity Laws, result in an exponential reduction in energy used compared to pump speed and water flow. For example, cutting the flow in half with a variable speed pump might use one quarter of the energy! To get the same flow you could run the pump twice as long but your energy costs would be cut in half!