LOCHINVAR GCRL-50 4**

This site computed the 273 therms figure; the registry does not list it. It combines the registry's UEF, the ratio of hot water delivered to energy used, of 0.62 with the DOE test's daily hot-water draw for the high draw pattern. That pattern represents a larger household, or one where showers and laundry overlap. The figure applies only at that test draw. A home that draws more or less hot water will use a different amount of gas. The registry values come from the DOE CCD, retrieved 2026-09-19. Our explanation of how the annual figures are calculated sets out each step from UEF to yearly energy use.

The 50-gallon tank has a first hour rating, the gallons of hot water available in the first hour from a full tank, of 81 gallons. This model was tested at the high draw pattern, so it is meant for the household the high draw pattern describes. It is compared with the 414 models registered as a gas tank at the high draw pattern. Within that group it sits in the highest quarter for energy use. A reader who wants lower gas use at this draw pattern would look at models below the 260 therms median. A reader who needs a like-for-like swap can find a same-class replacement by model number. The data does not show whether the model fits a particular home in other ways.

The text gives no running cost. The yearly bill for 273 therms of natural gas depends on the average residential gas price in the reader's state, and that price is not in this data. So the page calculates the cost from the reader's ZIP code. The 13 therms gap above the class median also depends on that rate, so its cost cannot be given without the rate. The installed price range appears in its own block, with its source and date. It is a modeled range, not a quote. To apply your own rate to this model's gas use, use the running cost calculator for your ZIP code.