Energy savings in fan and pump installations employing vfd's and using closed loop control with pressure feedback can be significant. These potential savings are the justification for the purchase and installation of drives. Advancements in vfd technology continually induce businesses to "spend in order to save."
Realizing that potential, however, has often proven to be elusive, due to the inherent dependency for success on proper placement of the pressure feedback transmitter in the air or water distribution system.