Noritz NRC111DV (GQ-C3257WX-FF US)

This site calculated the 186 therms figure; the registry does not publish it. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for the high pattern. For this model the UEF is 0.91. The figure therefore holds only at the federal test's daily draw. This data has no annual figure for a household whose daily draw differs from that test. The underlying rating comes from DOE CCD, retrieved 2026-09-19. The rank given above puts this model in the second-highest quarter of its class for energy use. The steps behind the annual energy figures are set out on the methodology page.

The high draw pattern stands for a larger household, or one where showers and laundry overlap. That is the kind of home the 186 therms figure describes. The registry also lists a maximum flow rate in gallons per minute of 5.7 for this model. That rating is about how much hot water flows at once, not how much gas the unit uses in a year. For a smaller household with separate showers and laundry, this data gives no energy figure. If you are replacing an existing unit, you can find a same-class replacement by model number. To look at other fuels or sizes, the water heater selector by fuel, space and size sorts registered models by those criteria.

This text does not give the running cost, because it depends on the reader's own rate. The page computes it from 186 therms and the state average residential gas price for the reader's ZIP. The 4 therms gap above the class median becomes a cost at that same rate, so its size also varies by state. The gas price does not change the annual energy use or the class rank; it changes only the cost. The cost calculator on your own ZIP shows both results. The installed price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote from an installer.