Noritz NRCR92DV (GQ-C2660WXQ-FF US)

This site computed the 178 therms figure; the registry does not publish it. It combines two inputs. The first is the registry's UEF, the ratio of hot water delivered to energy used, which is 0.95 for this model. The second is the daily hot-water draw that the DOE test sets for the high draw pattern. The figure describes use at that federal daily draw only. A household drawing more or less hot water would use a different amount. The source data is the DOE CCD, retrieved 2026-09-19. Among the 397 models in this class, the unit ranks 45th lowest for energy use, which places it in the lowest quarter of its class. The steps behind this figure are set out in how the annual cost is calculated.

The high draw pattern stands for a larger household, or one where showers and laundry overlap. That is the household the 178 therms figure models. The unit's maximum flow rate in gallons per minute is 4.9. It is the rated ceiling on hot water delivered at one time. A smaller household that draws less hot water is not the case this figure describes. The registry gives no energy figure for this model at a lower draw pattern, so that value is not available here. The class rank above applies only among units tested at the high draw pattern. To check units in other classes by fuel, space and size, use the water heater selector by fuel, space and size. To match this model within its own class, use the same-class replacement search by model number.

This text states no running cost. The cost of 178 therms of natural gas a year depends on your state's average residential gas price. For that reason the page computes the cost from your ZIP. The same 178 therms gives a different yearly cost in each state. The 4 therms gap to the class median converts at that same local rate. Enter your ZIP in the cost calculator for your own ZIP to see the figure for your rate. The installed-cost range appears in its own block on this page, with its source and date. It is a modeled range, not a quote. This page has no gas-use figure for households whose daily draw differs from the federal test's draw.