Rheem PROG40-40N RH67 PDV

The 176 therms figure is computed by this site. The registry does not publish 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 for the medium pattern. This model's UEF is 0.63. The registry data comes from DOE CCD, retrieved 2026-09-19. The result holds only at that test draw. It does not describe a household that draws more or less hot water each day. Among the 288 models registered as a gas tank at the medium draw pattern, this one ranks 62nd lowest in energy use. That places it in the lowest quarter of its class. The steps behind the figure are set out in how the annual cost is calculated.

The medium draw pattern corresponds to a typical three- or four-person household. This model's first hour rating, the gallons of hot water available in the first hour from a full tank, is 67 gallons. Its rated volume is 38 gallons. For a household whose use matches the medium pattern, the 176 therms figure is a fair point of comparison. A household with heavier daily demand falls outside the test condition, so the figure does not describe it. The same limit applies to a smaller household with lighter use. The registry data here does not show how this unit performs at other draw levels. To compare units by fuel and size, use the selector by fuel, space and size.

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. The 9 therms gap below the class median of 185 therms becomes a cost difference only at your own rate. The cost calculator on your own ZIP applies that rate to the 176 therms figure. The installed-cost range shown elsewhere on this page is a modeled range, not a quote. It carries its own source and date. Metered gas use for any installed unit of this model is not available from the registry. The figure on this page is a test-condition value, not a reading from a home.