LOCHINVAR T-H3J-DV-N 1**

The figure of 180 therms of natural gas is computed by this site, not by the registry. It uses the registry's UEF, the ratio of hot water delivered to energy used, of 0.94, together with the DOE test's daily hot-water draw for the high draw pattern. The source is DOE CCD, retrieved 2026-09-19. Against its class, the unit ranks 165th lowest energy use of 397, which places it in the second-lowest quarter of its class for energy use. The rank compares energy use at this draw pattern only, and it says nothing about other measures.

The high draw pattern describes a larger household, or one where showers and laundry overlap. The 180 therms figure belongs to that pattern only, so it is a fair check for a household that matches it. Annual energy for this model at other draw patterns is not available on this page, and this page does not estimate it. The registry also lists a maximum flow rate in gallons per minute of 4.7. That rating does not state how many fixtures can run at once, and this page does not derive it. To narrow models by fuel, space and size, use the water heater selector.

The running cost is not written in this text because it depends on the state average residential gas price, which differs by reader. Multiplying 180 therms by the gas price per unit of energy in your state gives the yearly gas cost at the high draw pattern. The cost calculator does this from your ZIP code, and the steps behind it are in the annual cost methodology. Actual use in a home can differ from the test's daily draw, and the registry gives no measurement of it. The modeled installed-cost range appears in its own block with its source and date, and it is not a quote.