The headline above is a reminder that a fan and a damper, when assembled, become a fan + damper system, which is more than a simple sum of the two individual items of equipment. They may be operated ...

In most fan systems a single fan is selected for the required system design rating. Various methods of control are employed such as dampers, variable inlet vanes, variable pitch blades, or variable ...

There are well-known benefits of using variable-frequency drives (VFDs) to reduce energy consumed by induction motors. Federal, state and local agencies in the U.S. now all give incentives for ...