Ruud PROG50-42N RH67 PV

This site calculated the 249 therms figure. The registry does not list it. 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 high draw pattern. This model's UEF is 0.68. The inputs come from the DOE Compliance Certification Database, retrieved 2026-09-19. The figure describes the test's assumed usage, not any particular home. A household that draws more hot water than the test assumes will use more gas than 249 therms, and one that draws less will use less. Among the 414 gas tank models registered at the high draw pattern, this model ranks 164th lowest in energy use. That places it below the class median of 260 therms.

The high draw pattern stands for a larger household, or one where showers and laundry overlap. The 249 therms figure applies only to that usage level. The model's first hour rating, the gallons of hot water available in the first hour from a full tank, is 78 gallons. Its rated volume is 48 gallons. A plumber or seller checking a match can compare these values with the unit being replaced. You can also find a same-class replacement by model number. If a household's busiest hour needs more than 78 gallons, this rating does not cover that demand. Annual energy figures for other draw patterns are not available on this page.

The text does not give a running cost. The cost of 249 therms of natural gas depends on your state's average residential gas price. For that reason, the page calculates it from your ZIP. Use the cost calculator for your own ZIP to see the figure at your rate. The page on how the annual cost is calculated shows how the UEF and the test's daily draw produce the energy figure. The 11 therms gap below the 260 therms class median is a difference in gas use. Its value in money depends on your rate. The installed price in its own block is a modeled range, not a quote.