State HPTV-80 2**

It holds 82 gallons in the test, 2 gallons more than its 80-gallon sold size. Over one hour from a full tank, it gave 93 gallons in the test (its first-hour rating). Reheating lets it give 11 gallons beyond the 82 gallons in its tank. In the first hour, 38 of the 481 heat pump models give more hot water. The median heat pump model gives 72 gallons in its first hour.

Its single model number, HPVX-80-DHPT 2**, is ENERGY STAR certified. For each unit of energy it uses, 3.00 units end up in the hot water (its UEF). It moves heat from the air rather than making it, so its UEF passes 1. In the test, daily hot water use was set to high (its draw pattern). Of 237 heat pump models with the same draw pattern, 231 have a higher UEF and one a lower one. For its type and draw pattern, the UEF runs from 2.85 to 4.95. While it reheats, the water gains 373% of the energy it uses (its recovery efficiency).

Its test figures match those of 4 other basic models. They are listed under 4 other brands, one each. For the full group, see the A. O. Smith HPTV-80 2**.

It may qualify for 18 rebate programs in 19 states. Another 6 rebate programs may accept it if it meets their other terms.