LOCHINVAR GCRL-50 2**

The 273 therms figure is computed 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 draw for the high pattern. This model's UEF is 0.62, taken from the DOE Compliance Certification Database and retrieved 2026-09-19. Ranked by energy use, the model is 367th lowest of 414 in its class. That places it in the highest quarter of the class for energy use. The registry data does not cover a household that draws more or less hot water than the test assumes, so its gas use is not available here. The steps behind the annual energy and cost figures are set out separately.

The high draw pattern describes a larger household, or one where showers and laundry overlap. The model's first hour rating, the gallons of hot water available in the first hour from a full tank, is 78 gallons. Its rated volume is 49 gallons. The annual figure above holds only at this draw pattern. For a smaller household with lighter daily use, no energy figure for this model is available on this page. Because the model sits 13 therms above its class median, a reader looking for lower gas use at the same pattern can find a same-class replacement by model number. That search keeps the comparison inside the same gas tank, high draw pattern class of 414 models.

This page does not state a running cost in the text. The cost of 273 therms of natural gas a year depends on your state's average residential gas price. The page therefore computes it from your ZIP. The cost calculator on your own ZIP applies that rate to this model's figure at the high draw pattern. If your daily hot-water use differs from the test's draw, the gas used and its cost will also differ, by an amount not available here. The installed price appears in its own block as a modeled range with its source and date, not a quote. Neither the running cost nor the installed price changes the model's UEF of 0.62 or its class rank.