Pumps & Systems, Oct. 2016, by Gary Wamsley.
http://www.pumpsandsystems.com/pumps/october-2016-get-ready-new-federal-pump-efficiency-rules

"The U.S. Department of Energy (DOE) earlier this year published a request to industry for assistance in developing new efficiency standards for pump systems. The federal notice (81 FR 5658) will lead to new federal regulations aimed at improving reliability and further reducing energy consumption nationwide in pumps, including circulator pumps."