LOCHINVAR T-H3-DV-N 1**

The 182 therms figure is not a registry entry. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used, and from the DOE test's daily hot-water draw for the high draw pattern. The model's UEF is 0.93, and the data was retrieved from DOE CCD on 2026-09-19. The figure applies only to natural gas at that test draw. A household that draws more or less hot water than the test will use a different amount, and the registry gives no measured use for any single home. The maximum flow rate in gallons per minute is 5.8. It is a separate rating and is not part of this calculation.

The comparison group is the 397 models registered as a gas tankless unit at the high draw pattern. This model ranks 183rd lowest in energy use of 397, which places it in the second-lowest quarter of its class. Its 182 therms matches the class median of 182 therms, so the difference is 0 therms. That fits a larger household, or one where showers and laundry overlap, and expects typical use for the class rather than lower use. It does not describe a household with a lighter draw, and this page has no figures for other draw patterns. To compare other units, try the water heater selector by fuel, space and size or find a same-class replacement by model number.

Running cost is not stated here because it depends on your state's average residential gas price, and this page does not estimate it. The quantity that price applies to is the 182 therms at the high draw pattern, measured against a class median of 182 therms. The cost calculator applies your own ZIP to that figure. The steps behind it are described in how the annual cost is calculated. The installed price range appears in its own block with its source and date. It is a modeled range, not a quote, and it is not repeated in this text.