Richmond PRO+G40-38U RH67 PD*

The 173 therms figure is computed by this site, not copied from the federal registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the daily hot-water draw in DOE's test. For this model the registry lists a UEF of 0.64, in DOE CCD data retrieved on 2026-09-19. The medium pattern represents a typical mid-sized household, including its busy morning demand. A home that draws more hot water than that pattern will use more than 173 therms, and a lighter home will use less. The steps behind this estimate are set out in our method for calculating annual energy and cost.

Against the 288 models registered as a gas tank at the medium draw pattern, this unit ranks 44th lowest in energy use. The 12 therms gap to the class median, noted above, puts it in the lowest quarter of its class. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 67 gallons. The registry lists a rated volume of 38 gallons, and both figures can be checked against the registry entry for PRO+G40-38U RH67 PD*. The ratings fit a household whose use is close to the medium pattern, because that is the only draw the 173 therms figure describes. To see other models in the same class, try finding a same-class replacement by model number.

A household that regularly needs more than the 67-gallon first hour rating may find this unit runs short at peak times. The yearly running cost is not stated here, because it depends on your state's average residential gas price. The page computes it from your ZIP by applying that price to the 173 therms figure. You can repeat the calculation in the water heater running-cost calculator for your ZIP. The installed-cost range shown on this page is a modeled range with its own source and date, not a quote. Any figure beyond the medium draw pattern, such as use at a heavier pattern, is not available in this data.