LAARS KGWH-150JFN

The figure of 173 therms is computed by this site, not published by the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, which is 0.98 for this model, with the DOE test's daily hot-water draw for the high draw pattern. The source is DOE CCD, retrieved 2026-09-19. The figure therefore applies only at that test draw; a household that uses more or less hot water than the test assumes will use a different amount of gas. The comparison group is the 397 models registered as a gas tankless unit at the high draw pattern. Their median is 182 therms, so this unit sits 9 therms below it, in the lowest quarter of its class for energy use.

The high draw pattern describes a larger household, or one where showers and laundry overlap. That is the only case this comparison covers. The maximum flow rate in gallons per minute is 4.3 for this model. The registry data used here do not show whether that flow meets the demand of a particular house, so the energy figure says nothing about simultaneous fixtures beyond the test. A household with a lighter draw is not covered, because the 397 models were grouped at the high draw pattern only. To compare units by fuel, space and size, use the water heater selector. To look for a same-class alternative, the replacement finder by model number can start from KGWH-150JFN.

The running cost is not stated in the text. It depends on the average residential gas price in the reader's state, and that price is not part of the registry data. Multiplying 173 therms by the price per therm that applies to you gives the yearly gas cost at the high draw pattern. The cost calculator does this from your ZIP code, and the page on how the annual cost is calculated lists the inputs. The 9 therms gap to the class median of 182 therms changes the yearly cost by that many therms at your price, and by nothing more. The installed price range appears in its own block on this page, with its source and date, and is not repeated here.