Circulator Pumps

THE PRODUCT:

Circulator pumps are a type of small centrifugal pump used in both residential and commercial applications. The most common uses for circulator pumps include circulating hot water in hydronic heating systems as well as hot water recirculation systems.

THE STANDARD:

DOE finalized new circulator pump standards in 2024, which require compliance starting May 22, 2028. The new standards set the first efficiency requirements for circulator pumps and effectively require the use of efficient single-speed electronically commutated motors (ECMs). The finalized standards are consistent with a 2016 consensus recommendation from a working group comprised of manufacturers and efficiency advocates.

KEY FACTS:

Single-speed ECMs can reduce circulator pump energy usage by almost half relative to induction motors. Circulator pump efficiency can be further improved by using variable-speed ECMs with temperature and/or pressure controls.