JETGLAS RG2D40S*N

It holds 38 gallons in the test, 2 gallons less than its 40-gallon sold size. It delivers 62 gallons of hot water in the test's first hour. Reheating lets it give 24 gallons beyond the 38 gallons in its tank. Of 763 gas storage models, 671 give more hot water in the first hour. Among gas storage models, the median first-hour rating is 78 gallons.

As of Oct 26, 2026, it was not listed as ENERGY STAR certified. In tests, 64% of the energy went to hot water, so its UEF is 0.64. In the test, daily hot water use was set to medium (its draw pattern). Its UEF is lower than that of 43 of the 288 gas storage models with its draw pattern. For its type and draw pattern, the median UEF is 0.60. Of the energy spent to reheat water, 78% goes into it (its recovery efficiency).

It is sold as RG2D40S*N, RG2D40S*X, and URG2D40S*N. Its test figures match those of one other basic model. That one carries the Bradford White brand name. You can find the whole group on the page for the Bradford White RG2D40S*N.

It may qualify for one rebate program.