RELIANCE WATER HEATERS T-H3-DV-N 1**

The 182 therms figure was calculated by this site. The registry does not publish it. It combines the model's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for the high pattern. This unit's UEF is 0.93, taken from the DOE CCD registry on 2026-09-19. At that draw, it ranks 183rd for lowest energy use among the 397 gas tankless units at the high pattern. That puts it in the second-lowest quarter of its class, at the median noted above. A household that draws more or less hot water than the test will use a different amount. That amount is not available here. The steps are set out in how the annual cost is calculated.

The high draw pattern describes a larger household, or one where showers and laundry overlap. The 182 therms figure applies to that kind of use. The registry also lists a maximum flow rate in gallons per minute of 5.8 for this unit. A plumber checking fit can compare that 5.8 rating with the fixtures expected to run together. If combined demand is above 5.8, it exceeds the registry rating. For a smaller household that draws less hot water, the high-pattern figure does not describe its use. This page does not have a figure for this model at another draw pattern. The selector by fuel, space and size filters models on those terms.

The running cost is not stated in this text because it depends on your own gas rate. The page works it out from 182 therms of natural gas and your state's average residential gas price, found from your ZIP. The cost calculator on your own ZIP shows that result. It keeps the same condition as the energy figure: the high draw pattern at the DOE test's daily draw. The installed price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote. To check this model against others in its class, where the median is 182 therms, use find a same-class replacement by model number.