LOCHINVAR GCRL-30R 4**

The 185 therms figure was computed by this site, not taken from the registry. It uses the registry's UEF, the ratio of hot water delivered to energy used, which is 0.6 for this model. The site combines that with the DOE test's daily hot-water draw for the medium pattern. Only those two inputs go into the figure. Households that use more or less hot water than the test draw will see a different annual figure. The DOE CCD source was retrieved on 2026-09-19. The steps are described in how the annual cost is calculated.

Against the 288 models registered as a gas tank at the medium draw pattern, this unit ranks 89th lowest for energy use. That places it in the second-lowest quarter of its class. Its 185 therms differs from the class median of 185 therms by 0 therms. On energy use alone, it matches the class median. Capacity is described by the first hour rating, the gallons of hot water available in the first hour from a full tank. This model's rating is 55 gallons, with a rated volume of 29 gallons. Neither rating changes the energy figure, which depends on the UEF and the draw pattern.

Running cost is not stated here, because it depends on your state's average residential gas price. Enter your ZIP in the cost calculator to apply that price to the 185 therms. This unit suits a reader who wants a gas tank at the class median of 185 therms for the medium draw pattern. It does not suit a household whose hot-water use is far from that test draw, because the figure would not describe it. The installed price range is not published, because this model's ratings lie outside the range the cost database's model was fitted on. The range is not stretched past it. To compare other units, use the water heater selector or find a same-class replacement by model number.