Kepler JSG52-32PCH-NG

The registry lists a UEF, the ratio of hot water delivered to energy used, of 0.95 for this model. This site combined that UEF with the DOE test's daily hot-water draw for the high draw pattern. The result is 178 therms of natural gas a year, computed by this site and not published by the registry. Among the 397 models registered as a gas tankless unit at this draw pattern, the median is 182 therms. This model uses 4 therms less than that median. It ranks 45th lowest in energy use of 397, in the lowest quarter of its class. The source is DOE CCD, retrieved 2026-09-19.

The high draw pattern describes a larger household, or one where showers and laundry overlap. The 178 therms figure applies to that pattern only. For a different draw pattern, this page has no figure, so the value is not available here. The unit's maximum flow rate in gallons per minute is 5.7. The registry gives this flow limit separately from energy use, so the two figures answer different questions. A household outside this pattern should not read the 45th rank as its own. To compare other fuels, sizes or spaces, use the water heater selector.

The running cost is not stated in this text, because it depends on the state average residential gas price. The page computes it from your ZIP, and the cost calculator shows the result for your own rate. The energy figure used is 178 therms of natural gas at the high draw pattern. Steps are described in how the annual cost is calculated. The modeled installed-cost range appears in its own block with its source and date, and is not a quote. The 4 therms gap to the 182 therms median is an energy difference at the test's draw. Real use will vary with your own hot-water habits.