LOCHINVAR GPVL-50 2**

This site calculated the 235 therms figure. The registry does not list it. The calculation uses two inputs. The first is this model's UEF, the ratio of hot water delivered to energy used. The second is the DOE test's daily hot-water draw for the high pattern. The registry lists the UEF as 0.72, retrieved from DOE CCD on 2026-09-19. The result holds only at that test draw. A home that draws more or less hot water each day will use a different amount of natural gas. This page has no figure for other draws. The method behind the annual energy and cost figures sets out each step, so a plumber or seller can check the arithmetic against the registry entry.

The high draw pattern represents a larger household, or one where showers and laundry overlap. This model's first hour rating, the gallons of hot water available in the first hour from a full tank, is 79 gallons. Its rated volume is 49 gallons. Among the 414 models registered as a gas tank at the high draw pattern, this one ranks 50th lowest for energy use. That puts it in the lowest quarter of its class. The comparison covers that class only and does not rank this unit against other fuels or heater types. A household with lighter daily use falls outside the test condition behind these numbers. To look for other units in the same class, the same-class replacement finder by model number starts from GPVL-50 2**.

This text does not state a running cost. The cost depends on your state's average residential gas price, so the page calculates it from your ZIP. At 235 therms a year, a higher gas price means a higher yearly cost. The cost of the 25 therms gap to the 260 therms median rises with the price in the same way. To see the figure for this model, enter a ZIP in the running cost calculator for your own gas rate. The installed price range has its own block, with its source and date. That range is a modeled installed cost, not a quote. The registry does not show how much gas this unit will use in a particular home, so an actual bill is unknown.