State GCR-50 2**

It holds 48 gallons in the test, 2 gallons less than its 50-gallon sold size. Over one hour from a full tank, it gave 81 gallons in the test (its first-hour rating). Its tank holds 48 gallons, so reheating adds 33 gallons during the first hour. Among 763 gas storage models, 295 have a higher first-hour rating. The median gas storage model gives 78 gallons in its first hour.

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. The daily hot water use in the test, called its draw pattern, was high. Of 434 gas storage models with the same draw pattern, 255 have a higher UEF and 95 a lower one. For its type and draw pattern, the UEF runs from 0.61 to 0.90. Of the energy spent to reheat water, 80% goes into it (its recovery efficiency).

It is the basic model for GS6-50-BCT 2** and GS6-50-BCT 2*1. Its test figures match those of 5 other basic models. Each of them is listed under a different brand. For the full group, see the A. O. Smith GCR-50 2** page.