FRIEDRICH PROG40S-34N RH62 *

The figure starts from the registry's UEF, the ratio of hot water delivered to energy used, which is 0.59 for this model. This site combines it with the daily hot-water draw that the DOE test sets for the medium draw pattern. The registry does not publish the annual figure itself. The result is 188 therms a year, and it describes the test condition, not any particular home. The model sits 3 therms above the class median of 185 therms. Its rank is 186th lowest energy use of 288, which is the second-highest quarter of its class for energy use. The energy data comes from DOE CCD, retrieved 2026-09-19.

The first hour rating, the gallons of hot water available in the first hour from a full tank, is 65 gallons for this model. The rated volume is 38 gallons. These values fit a household close to the medium draw pattern, meaning a typical three- or four-person household. A household that draws more hot water than that pattern will use more gas than 188 therms. A household that draws less will use less. The data does not show how the figure changes at other draw patterns. Models ranked ahead of 186th use less energy at the same pattern. The water heater selector by fuel, space and size can narrow that list.

The running cost is not written here because it depends on the state average residential gas price. The cost calculator on your own ZIP applies that price to 188 therms. The result stays tied to the medium draw pattern. The 3 therms gap to the class median of 185 therms converts to cost the same way, using your rate. How the annual cost is calculated is documented separately. The installed price range is shown in its own block as a modeled range, not a quote. To compare against another unit in this class, you can find a same-class replacement by model number.