U.S. Craftmaster FMHR-30 4**

It holds 29 gallons in the test, 1 gallon less than its 30-gallon sold size. Starting full, it gives 63 gallons of hot water in its first hour of use. Reheating lets it give 34 gallons beyond the 29 gallons in its tank. In the first hour, 655 of the 763 gas storage models give more hot water. Among gas storage models, the median first-hour rating is 78 gallons.

On Oct 26, 2026, this heater was not listed as ENERGY STAR certified. In tests, 60% of the energy it uses ends up as hot water (UEF 0.60). Its test simulated a day of medium hot water use (its draw pattern). Of 288 gas storage models with the same draw pattern, 88 have a higher UEF. For its type and draw pattern, its UEF sits at the median. The water took in 79% of the energy used to reheat it (its recovery efficiency).

There are 5 more basic models with the same test figures. Each of the 5 other brands lists one of them. You can find the whole group on the page for the A. O. Smith FMHR-30 4**.