The United States Department of Energy has mandated pumps bought or sold in the United States for pool and spa filtration systems, whether commercial or residential, will have to be variable-speed. The decision, codified in “Energy Conservation Standards for Dedicated-Purpose Pool Pumps,” and effective July 18, 2021, was arrived at by a committee composed of manufacturers, utility companies, and advocates for green energy. Gary Fernstrom, a consultant who worked with the committee, shared, “The DOE decided that the incremental cost of the variable-speed pump is now low enough that there shouldn’t be anybody who ought not to want one…” The standards don’t rule out single-speed motors; they just set minimums beyond their capabilities. It is further expected Energy Star will have to raise its standards to remain relevant. The mandate is unlikely to change anything for large commercial operations, which are already regulated.