LOCHINVAR GDVT-50 3**

This site computed the 260 therms figure. The registry does not publish it. The calculation combines the registry's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for the high draw pattern. For this model the UEF is 0.65, taken from the DOE CCD on 2026-09-19. The figure holds only at that test draw. A household that draws more hot water each day will use more gas than 260 therms a year. A household that draws less will use less. The registry does not record real-world use, so no measured figure for any single home is available. The method behind the annual cost sets out the same inputs step by step.

The high draw pattern describes a larger household, or a household where showers and laundry overlap. This model lists a first hour rating, the gallons of hot water available in the first hour from a full tank, of 82 gallons. Its rated volume is 48 gallons. A home whose peak hour needs more than 82 gallons needs more than the rating covers. A smaller household may draw less than the test assumes. Its gas use would then differ from 260 therms, and the registry gives no figure for that case. The selector by fuel, space and size lists other gas tanks tested at the same draw. A same-class replacement search by model number starts from GDVT-50 3**.

The running cost is not given in this text because it depends on your state's average residential gas price. The page computes it from your ZIP by applying that rate to 260 therms a year at the high draw pattern. The cost calculator on your own ZIP shows the same calculation. This model sits 0 therms from the class median of 260 therms. Because the rate is the same for every model in a state, its yearly gas cost at the test draw matches that of a model at the class median. The rank of 204th is given with the class size of 414, so you can check it. The installed price range appears in its own block, with its source and date. It is a modeled range, not a quote.