LOCHINVAR GCRT-50 4**

The 277 therms figure is computed by this site, not taken from the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for this draw pattern. This model's UEF is 0.61, from DOE CCD data retrieved 2026-09-19. The figure holds only at the federal test's daily draw. A home that draws more or less hot water will use a different amount of gas. That amount is not available here. The page sets out how the annual cost is calculated, including the energy step.

The high draw pattern stands for a larger household, or one where showers and laundry overlap. For that use, this model lists a first hour rating, the gallons of hot water available in the first hour from a full tank, of 89 gallons. Its rated volume is 48 gallons. Among the gas tank models at the high draw pattern, it ranks 400th of 414 for lowest energy use. That places it in the highest quarter of its class for energy use. A plumber or seller can confirm these values against the registry entry for GCRT-50 4**. A reader who wants lower gas use at this draw pattern can compare models through a same-class replacement search by model number.

The running cost is not stated in this text. It depends on your state's average residential gas price, so the page computes it from your ZIP. You can check that figure with the cost calculator for your own ZIP. Because this model uses 277 therms a year, above its class median, its cost gap against the median also depends on that rate. The installed price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote. Your household's actual hot-water use is not in the registry, so a figure based on it is not available here.