Rheem PROG40-30P RH62 DV

The 191 therms figure is calculated by this site. It does not come directly from the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the daily hot-water draw that the DOE test sets for the medium pattern. For this model the UEF is 0.58. The medium pattern stands for a typical three- or four-person household. The registry data were retrieved from the DOE Compliance Certification Database on 2026-09-19. If your household uses more or less hot water than the test assumes, your gas use will differ. This page cannot say by how much. The page on how the annual energy and cost are calculated explains each step of the calculation.

Among the 288 gas tank models registered at the medium draw pattern, this unit ranks 231st lowest in energy use. That places it in the highest quarter of its class for energy use, so most models in the class use less gas at the same pattern. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 58 gallons, and its rated volume is 38 gallons. These figures suit a check against a household whose daily use matches the medium pattern. For heavier daily use, this page has no rated energy figure for this model. To compare it with other units in the same class, use the same-class replacement lookup by model number.

No running cost appears in this text, because it depends on your state's average residential natural gas price. The page therefore works it out from your ZIP code. The running cost calculator for your own ZIP applies that price to this model's 191 therms a year. The same rate also sets what the 6 therms gap above the class median is worth in your state. That value is not given here. The installed price range sits in its own block on this page, with its source and date. It is a modeled range for installation, not a quote from an installer. Energy and cost figures on this page apply only at the medium pattern of the federal test.