variable frequency-drive pumps

On Energy Stars and Watershapes
An Interview by Lenny Giteck The path to extending the Environmental Protection Agency's Energy Star certification program to the pool and spa industry was neither short nor smooth:  It took the industry fully five years to convince Energy Star to certify variable-speed pumps.  That important step began about a year ago, and now six manufacturers have earned certification for various energy-efficient pool-pump models. The Energy Star program was created in 1992.  A joint effort by the EPA and the U.S. Department of Energy, it seeks to identify, certify and promote consumer products that are energy-efficient.  In many cases, certified products consume up to a third less energy as compared to products that