Richmond PROG40S-40N RH62

The 191 therms figure is calculated by this site. The registry does not publish it. The figure 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. For this model the UEF is 0.58, taken from the DOE Compliance Certification Database and retrieved 2026-09-19. The medium pattern stands for a typical household's daily use, so the figure holds only at that test draw. A household that draws more or less hot water than the test assumes will use a different amount of gas. The steps are set out in how this site calculates annual energy and cost.

The 6 therms gap noted above puts this model in the highest quarter of its class for energy use. Most of the 288 gas tanks at the medium draw pattern use less gas at the test draw. This model's first hour rating, the gallons of hot water available in the first hour from a full tank, is 66 gallons from a rated volume of 39 gallons. That rating is the figure to compare with a household's busiest hour of hot-water use. A reader who wants lower gas use at the same draw pattern can list models with lower energy use through the same-class replacement search by model number. A reader who needs a different fuel or size can use the selector by fuel, space and size.

The running cost is not given here because it depends on the reader's state average residential gas price. The page calculates it from the reader's ZIP by applying that price to 191 therms at the medium draw pattern. The cost of the 6 therms gap from the class median also depends on that local price. The cost calculator for your own ZIP shows both at your rate. The installed price range appears in its own block on this page, with its source and date. It is a modeled installed-cost range, not a quote. This page does not have the model's energy use at any draw pattern other than medium.