Rheem PROG30-32N RH63 MH *

The annual figure of 185 therms does not come straight from the registry. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used, which is 0.6 for this model, and from the daily hot-water draw that the DOE test assigns to the medium draw pattern. The source data is DOE CCD, retrieved 2026-09-19. The figure applies only to natural gas at that draw. A household that draws more or less hot water will use a different amount, and this page does not estimate it. The calculation steps are set out under how the annual cost is calculated.

This model has a first hour rating, the gallons of hot water available in the first hour from a full tank, of 52 gallons, and a rated volume of 28 gallons. Those two values, together with the medium draw pattern, describe who the energy figure fits: a typical household on a busy morning. A household whose peak hour needs more hot water than 52 gallons falls outside what this page verifies. On ranking, this model is 89th lowest of 288 gas tank models at the medium draw pattern. Its difference from the class median is 0 therms, so the rank does not show a gap in therms. To compare other fuels, sizes or spaces, try the water heater selector by fuel, space and size.

Running cost is not stated in this text because it depends on your state's average residential gas price. The cost calculator on your own ZIP applies that price to the 185 therms shown here, at the medium draw pattern. A price range for the unit itself is not published: this model's ratings lie outside the range the cost database's model was fitted on, and the range is not stretched past it. Nothing here estimates a price for this model. If you need a unit in the same class, find a same-class replacement by model number, starting from PROG30-32N RH63 MH *. The UEF of 0.6 is the registry's value, and this page does not test it independently.