Envirosense Enercare GPCX-50L 1**

It holds 49 gallons in the test, 1 gallon less than its 50-gallon sold size. Over one hour from a full tank, it gave 118 gallons in the test (its first-hour rating). Reheating lets it give 69 gallons beyond the 49 gallons in its tank. In the first hour, 43 of the 763 gas storage models give more hot water. The median gas storage model gives 78 gallons in its first hour.

It is ENERGY STAR certified under its single model number. In tests, 90% of the energy it uses ends up as hot water (UEF 0.90). Its test simulated a day of high hot water use (its draw pattern). No other gas storage model among the 434 on its draw pattern has a higher UEF. A UEF of 0.66 is the median for its type and draw pattern. The water took in 92% of the energy used to reheat it (its recovery efficiency).

Its test figures match those of 11 other basic models. Between them, those basic models carry 7 other brand names. For the full group, see the A. O. Smith GPCX-50L 1**.

In 4 states, 4 rebate programs may accept it. Another one program may accept it if it meets their other terms.