State FMDV-50 2**

It holds 47 gallons in the test, 3 gallons less than its 50-gallon sold size. Starting full, it gives 67 gallons of hot water in its first hour of use. Reheating lets it give 20 gallons beyond the 47 gallons in its tank. In the first hour, 552 of the 763 gas storage models give more hot water. The median gas storage model gives 78 gallons in the first hour of the test.

As of Oct 26, 2026, it was not listed as ENERGY STAR certified. In tests, 57% of the energy it uses ends up as hot water (UEF 0.57). The daily hot water use in the test, called its draw pattern, was medium. Among 288 gas storage models on its draw pattern, 277 have a higher UEF. On its draw pattern, the median gas storage UEF is 0.60. When it reheats water in the test, 77% of the energy it uses ends up in the water.

Its 2 model numbers are GS6-50-MDV 2** and SCI-50-MDV 2**. There are 4 more basic models with the same test figures. They are listed under 4 other brands, one each. For the full group, see the A. O. Smith FMDV-50 2**.