Your heat pump water heater is costing more than it should. The data can show you why.

We diagnose and design central heat pump water heating systems for hotels, grocery and multifamily buildings in California.

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What changes when plant design is changed.

Two hot water plants side by side, labeled Swing Tank Setup and Return to Primary Setup, each with two glowing storage tanks tagged hot layer or mixed and a mixing valve at the top, under the heading Same conditions: cold water 59 °F, heat pump air 66 °F, hot water per day 575 gallons.
Two configurations under the same conditions: same cold water, same air, same hot water use. Left, the swing tank setup: a heat pump tank feeds an electric tank. Right, the return-to-primary setup: two heat pump tanks in parallel. Color shows water temperature, and the count shows electricity used. Over the whole day, is there any difference in the performance?!

One fault, one chart, one number — twice a month.

HPWH Insights, from AbGarm Energy

Field data from central heat pump water heating systems: what goes wrong, what it costs, and what to check this week. No vendor pitches.

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About AbGarm Energy

AbGarm Energy helps building owners get the hot-water performance they were promised. Our work is technology agnostic: we make sure your plant delivers what it was designed to deliver.

Our work draws on years of energy systems analysis and co-authorship of several California emerging-technology studies on central heat pump water heating.

Based in the San Francisco Bay Area; we work statewide.

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