RELIANCE WATER HEATERS GCRH-40 4**

The annual figure of 188 therms is computed by this site, not by the registry. The registry lists a UEF, the ratio of hot water delivered to energy used, of 0.59. This site combines that value with the daily hot-water draw the DOE test uses for the medium draw pattern. The source is DOE CCD, retrieved 2026-09-19. The figure describes natural gas use for a typical household at that test draw. A household that draws more or less hot water will use a different amount. The methodology page explains how the annual cost is calculated.

This model sits above the class median by 3 therms, at 188 therms against 185 therms. The registry data places it in the second-highest quarter of the 288 models for energy use. That reading suits someone verifying that a listed unit matches its class, such as a plumber or a seller. It does not support a claim that the unit uses less energy than its peers. A model ranked before 186th in this class uses less natural gas at the same draw pattern. To see such models, find a same-class replacement by model number.

Running cost is not stated here because it depends on the state average residential gas price. The cost calculator for your own ZIP applies that price to 188 therms. The first hour rating, the gallons of hot water available in the first hour from a full tank, is 65 for this model. Its rated volume is 38 gallons. Those two values describe capacity at the test conditions only. A household with much larger hot-water use than the medium draw pattern is outside what the energy figure describes. The installed price range appears in its own block on this page and is not repeated here.