Envirosense GPCX-50L 1**

The figure of 188 therms of natural gas is not a registry entry. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used, and the DOE test's daily hot-water draw for this draw pattern. The UEF for this model is 0.9. The result holds only at the high draw pattern and was retrieved from the DOE CCD on 2026-09-19. Among the 414 gas tank models registered at that pattern, this model ranks 1st lowest in energy use, which places it in the lowest quarter of its class. The gap from the class median is stated above and rests on the same test conditions. The calculation method explains how the annual figure is derived.

The high draw pattern describes a larger household, or one where showers and laundry overlap. The model's first hour rating, the gallons of hot water available in the first hour from a full tank, is 118 gallons, and its rated volume is 49 gallons. Both are the registry's own figures for this unit. The annual energy figure suits a reader whose household resembles that test draw and who uses natural gas. It does not describe a household with a different daily draw, and it does not apply to another fuel. The data for this page gives no energy figure at any other draw pattern, so none is stated. To compare by fuel, space and size, use the water heater selector.

Running cost is not stated here because it depends on the state average residential gas price where the reader lives. To estimate it, multiply 188 therms by that price per therm; the cost calculator does this from the reader's ZIP. The result carries the same condition as the energy figure: the high draw pattern at the federal test's daily draw. Use in a real home can differ from the test. An installed price range is not published for this model, because its ratings lie outside the range the cost database's model was fitted on, and the range is not stretched past it. For a same-class alternative, find a replacement by model number, starting from GPCX-50L 1**.