FRIEDRICH PRO+G55-50N RH59

The figure of 273 therms is computed by this site, not by the registry. 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. The source is DOE CCD, retrieved 2026-09-19. The unit is a gas tank with a rated volume of 55 gallons. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 91 gallons. The energy figure applies only at that test draw. A household that draws more or less hot water than the test assumes will use a different amount of gas.

Among the 414 models registered as a gas tank at the high draw pattern, this one uses 13 therms more than the class median of 260 therms. Its rank of 367th lowest puts it in the highest quarter of the class for energy use. The high draw pattern describes a larger household, or one where showers and laundry overlap, so the comparison is fair for that situation. It is less useful for a reader who mainly wants low gas use, because most models in the class use less at this draw. To check same-class alternatives, use the replacement finder by model number or the water heater selector by fuel, space and size.

The running cost is not stated here. It depends on the state average residential gas price, and no rate is assumed for you. Multiplying 273 therms by your own rate gives the yearly gas cost at the test draw. The cost calculator on your own ZIP does this for you, and the annual cost methodology explains each step. Actual bills also depend on how much hot water your household uses, which the registry does not record. The installed price range appears in its own block on this page, with its source and date, and is a modeled range, not a quote.