GE GP40S**BXR01

This site calculates the 191 therms figure; it is not taken directly from the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, of 0.58 with the DOE test's daily hot-water draw for the medium pattern. The source is the DOE CCD, retrieved 2026-09-19. Among the 288 gas tank models at the medium draw pattern, this unit ranks 231st lowest of 288 for energy use. That places it in the highest quarter of its class for energy use. Every model in the class is calculated at the same draw, so the 6 therms gap to the 185 therms median comes from UEF alone. The method behind the annual cost figure lists each input.

The medium draw pattern represents the daily use of a typical mid-sized household. The 191 therms figure applies only at that pattern. The registry lists a first hour rating, the gallons of hot water available in the first hour from a full tank, of 66 gallons, and a rated volume of 40 gallons. A plumber or seller checking a label can match these values against the registry entry. For a home that draws well above the medium pattern, the annual figure here does not describe its use. This page has no energy figure for other draw patterns, so that value is not available. Readers comparing fuel, space or tank size can use the water heater selector by fuel, space and size.

This text does not state the running cost. It depends on your state's average residential natural gas price, which this site applies to the 191 therms figure. The page calculates it from your ZIP code, and the running cost calculator for your own ZIP shows the result. Because this unit sits 6 therms above the class median, it uses more gas than half its class at any given price. How much that gap costs also depends on your rate. The installed price range appears in its own block, with its source and date. It is a modeled range, not a quote, and this text does not repeat it. To look for another gas tank model at the medium draw pattern, you can find a same-class replacement by model number.