The pump trade association, The Hydraulic Institute, is seeking input from pump manufacturers on a framework for a distinct circulator pumps standard to present to the U.S. Department of Energy.

Circular pumps are excluded from the proposed energy conservation standard and test procedure for Commercial and Industrial Pumps (CIP), for which HI played a leading role in organizing the pump industry and facilitating data gathering and standards development.

The proposed CIP rule will eliminate the least efficient 25 percent of CIPs and includes performance metrics for constant speed equipment with no controls and for variable speed equipment with controls, acknowledging the benefits of the system approach to reducing energy.

As a result of the CIP ASRAC negotiations, certain pump types, such as the circulator pump, were excluded from the proposed rule. Circulator pumps are relatively small centrifugal pumps designed for hydronic systems where only pipe friction head must be overcome.

The ASRAC negotiation recommended that the HI circulator committee and the energy advocates enter an informal negotiation process to develop a framework that could be presented to the DOE for a separate rulemaking suitable for circulator pumps.

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Currently the HI circulator committee and advocates are working on defining the following recommendations:

  • Definition of a circulator pump (Scope)
  • Performance metric to rate circulators
  • Circulator performance data & sales survey
  • Test procedure for circulators
  • Standard performance levels for circulator pumps

HI says circulator pump manufacturers and other interested parties should be involved with this informal negotiation, which will lead to a separate rule focused on circulator pumps.  Interested parties can contact Peter Gaydon, Technical Director, Hydraulic Institute, at with any questions.