JETGLAS RG240T*N

The registry lists JETGLAS RG240T*N with a UEF, the ratio of hot water delivered to energy used, of 0.64. This site combined that value with the DOE test's daily hot-water draw for the high draw pattern to reach 264 therms of natural gas a year. The registry does not publish that annual figure itself. It was computed here from registry data retrieved from DOE CCD on 2026-09-19. Among the 414 gas tank models at this draw pattern, the unit ranks 236th lowest for energy use. That places it in the second-highest quarter of its class, with use 4 therms above the class median of 260 therms.

The high draw pattern describes a larger household, or one where showers and laundry overlap, so the figure applies to that kind of use only. The unit has a first hour rating, the gallons of hot water available in the first hour from a full tank, of 75 gallons, and a rated volume of 38 gallons. Those two values are the ones to compare with your own peak-hour demand. Someone whose main aim is the lowest energy use in the class should note that this unit sits above the class median. This page gives no figure for other draw patterns, so 264 therms should not be carried over to them. The water heater selector filters by fuel, space and size.

Running cost is not written in the text, because it depends on the state average residential gas price where you live. The annual energy of 264 therms is fixed by the test conditions, but the price per therm is yours to apply. The cost calculator takes your ZIP and applies that price to this model's figure. The methodology page explains how the annual cost is calculated. The gap of 4 therms from the class median of 260 therms is also measured in therms, so its cost scales with the same price. Actual use in a home can differ from the test draw, and this page does not estimate that difference. To compare within the same class, find a replacement by model number.