Noritz EZ111DV (GQ-C3260WX-FF US)

This site computed the 176 therms figure; the registry does not publish it. The calculation starts from the registry's UEF, the ratio of hot water delivered to energy used, which is 0.96 for this model. That value is paired with the DOE test's daily hot-water draw for the high draw pattern. The UEF comes from DOE's Compliance Certification Database, retrieved 2026-09-19. The annual figure therefore holds only at that federal test draw. It does not describe a household whose daily hot-water use differs from the test. The gap of 6 therms below the 182 therms class median is measured at the same test draw. The steps behind this calculation are set out on the page explaining how the annual cost is calculated.

The high draw pattern stands for a larger household, or one where showers and laundry overlap. The 176 therms figure applies to that kind of use. The registry lists a maximum flow rate in gallons per minute of 5.6 for this model. The temperature rise behind that rating is not given in this data. How the flow divides across fixtures running at once is also not available here. For a household with lower daily use, the high-pattern figure is not a direct match. A figure for a lower draw pattern is not available on this page. Readers comparing units of another fuel or size can use the water heater selector by fuel, space and size. A match within the same class of 397 models is available through the same-class replacement search by model number.

The running cost is not stated in this text. It depends on the average residential gas price in the reader's state. The page computes it from the reader's ZIP, applying that price to 176 therms a year at the high draw pattern. Readers in different states will therefore see different costs for the same unit. Every model in this class uses natural gas, so the class position does not change with the rate. The rank of 12th lowest of 397, and the gap of 6 therms below the median, stay the same at any gas price. The running cost calculator for your own ZIP shows the figure for a given location. The modeled installed-cost range appears in its own block, with its source and date, and is not a quote.