LOCHINVAR GCGH-50 2**

This site computes the 269 therms figure. The registry does not list 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 0.63. The source is DOE CCD, retrieved 2026-09-19. Among the 414 gas tank models at the high draw pattern, this model ranks 320th lowest for energy use. That puts it in the highest quarter of its class for energy use. The figure holds only at the federal test's daily draw. This page has no energy figure for households that use more or less hot water than that test draw.

The high draw pattern describes a larger household, or one where showers and laundry overlap. For that use, the model lists a first hour rating, the gallons of hot water available in the first hour from a full tank, of 76 gallons. Its rated volume is 48 gallons. If you are checking whether this unit matches a high-draw home, compare those two figures with the listing in front of you. If lower gas use within this class matters most to you, note the 9 therms gap above the 260 therms median. You can look up registered models in the same class through same-class replacement search by model number. This page has no data on how this unit performs outside the high draw pattern.

This text does not state a running cost. The cost depends on your state's average residential gas price, so the page computes it from 269 therms and the price for your ZIP. You can run that figure in the water heater cost calculator for your ZIP. The steps behind it are set out in how the annual running cost is calculated. The running cost has the same condition as the energy figure: it applies only at the high draw pattern. The installed price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote. The registry data does not show how long this unit lasts or what it costs over its lifetime.