About PumpCost Atlas

PumpCost Atlas exists because the number printed largest on a pool pump — its horsepower — is the one least able to tell you what the pump will cost you. Nameplate horsepower is a motor rating with a service factor baked into it. The quantities that decide your bill are the input power in watts at the speed you actually run, and the water that power moves. Both are published, for every ENERGY STAR certified pump, and almost nobody puts them next to each other.

So that is what this site does: it holds the certified records, shows each pump's weighted energy factor against its own class minimum and against the median of the certified list, and converts measured watts into money at a rate you can change. Where the source is silent — standby power on some records, a second speed point on single-speed pumps, anything at all about motor replacement compatibility — the page says so instead of filling the space.

Author

The PumpCost Atlas team. PumpCost Atlas is built and maintained by a small independent team. We compile certified pool pump test data published by ENERGY STAR, show the source and retrieval date for every figure, and publish the assumptions behind any calculation on the methodology page. We are not affiliated with, and not endorsed by, any of the organisations whose published data appears here.

Data and method

See the methodology page for every source, its retrieval date, and the four assumptions that are ours rather than anyone's data.

Not affiliated

ENERGY STAR is a programme of the U.S. Environmental Protection Agency. This site uses its published certified-product data and is not affiliated with, endorsed by or reviewed by the EPA, the Department of Energy, or any pump manufacturer.