FRIEDRICH PROG40-34U RH EC1

This site calculated the 188 therms figure; it does not come from the registry. It 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. This model's UEF is 0.59. The medium pattern represents a typical household with a busy morning of hot-water use. The result shows gas use at the test's draw. It is not the measured use of any particular home. This data does not include measured use in real homes. The registry values come from the DOE CCD, retrieved 2026-09-19. Each step is set out in how the annual cost is calculated.

Within its class, the model ranks 186th lowest energy use of 288. That puts it in the second-highest quarter of the class for energy use, 3 therms above the 185 therms median at the same test draw. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 71 gallons. Its rated volume is 38 gallons. Its figures apply to a household whose daily use is close to the medium pattern. The rating does not cover a household that needs more than 71 gallons in its busiest hour. To find models in the same class that use less at the same draw, use the same-class replacement search by model number.

The text on this page does not state a running cost. The cost of 188 therms of natural gas a year depends on the reader's state average residential gas price. For that reason the page calculates it from the reader's ZIP. The cost calculator on your own ZIP shows that figure. At any rate, the yearly gap to the class median is 3 therms multiplied by the price per therm. The installed price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote. This data does not show whether the unit fits a given space or fuel supply. The selector by fuel, space and size filters by those.