FRIEDRICH PROG50S-36N RH67 PV

This site computed the 242 therms figure; the registry does not list it. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw. The registry lists a UEF of 0.7 for this model. The figure holds only for natural gas at the high draw pattern. The source is the DOE CCD, retrieved 2026-09-19. The 18 therms gap from the 260 therms class median gives a rank of 90th lowest energy use among 414 models. That places it in the lowest quarter of its class for energy use. The method behind the annual figure is documented separately.

The high draw pattern describes a larger household, or one where showers and laundry overlap. The first hour rating, the gallons of hot water available in the first hour from a full tank, is 78 gallons. The rated volume is 48 gallons. The registry lists these values for the high draw pattern. A household with lighter use falls under a different draw pattern, so the 260 therms class median does not apply to it. The selector by fuel, space and size can narrow other options. The registry data does not say how much hot water your own home uses.

Running cost is not stated here because it depends on your state's average residential gas price. Multiply 242 therms by that price, in matching units, for a yearly figure at this draw pattern. The cost calculator on your own ZIP does this for you. The installed price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote. You can find a same-class replacement by model number using PROG50S-36N RH67 PV. The 18 therms gap from the median is measured in therms, so its cost depends on the same gas price.