American GCR-40 2**

It holds 38 gallons in the test, 2 gallons less than its 40-gallon sold size. It delivers 80 gallons of hot water in the test's first hour. Its tank holds 38 gallons, so reheating adds 42 gallons during the first hour. Among 763 gas storage models, 323 have a higher first-hour rating. 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 it uses ends up as hot water (UEF 0.64). Its test ran at the high level of daily hot water use. Of 434 gas storage models with the same draw pattern, 255 have a higher UEF and 95 a lower one. On its draw pattern, the median gas storage UEF is 0.66. When it reheats water in the test, 74% of the energy it uses ends up in the water.

Its 2 model numbers are G62-40T40 2** and G62-40T40 2*1. Its test figures match those of 4 other basic models. Each of the 4 other brands lists one of them. You can find the whole group on the page for the A. O. Smith GCR-40 2**.