FRIEDRICH PROG29-30U RH63 EC1*

This figure is 185 therms of natural gas a year at the medium draw pattern. This site computed it, not the registry, from the registry's UEF and the DOE test's daily hot-water draw for this pattern. UEF, the ratio of hot water delivered to energy used, is 0.6 for this model. The data comes from the DOE CCD, retrieved 2026-09-19. The comparison group is the 288 models registered as a gas tank at the medium draw pattern, with a class median of 185 therms. This model sits 0 therms from that median, so it is equal to it. Its rank is 89th lowest energy use of 288, in the second-lowest quarter of its class.

The figure applies only to the medium draw pattern, which describes a typical household on a busy morning. A household that draws more or less hot water than that will use a different amount, and this page does not estimate it. The unit has a first hour rating, the gallons of hot water available in the first hour from a full tank, of 51 gallons and a rated volume of 28 gallons. Those ratings suit a household whose morning demand matches the medium pattern. They say less about a household with heavier simultaneous use, for which the medium pattern figure is not the right basis. An installed price range is not published, because this model's ratings lie outside the range the cost database was fitted on.

Running cost is not stated here, because it depends on your state's average residential gas price. The 185 therms figure is the fixed part; the price per therm is yours. The cost calculator applies your ZIP to that figure, and how the annual cost is calculated explains the steps. To compare with another unit of the same class, find a same-class replacement by model number and enter PROG29-30U RH63 EC1*. Because this model is 0 therms from the class median of 185 therms, swapping to a median unit would not change annual energy at the medium draw pattern.