State HPTS-50 2**

It holds 46 gallons in the test, 4 gallons less than its 50-gallon sold size. It delivers 65 gallons of hot water in the test's first hour. Its tank holds 46 gallons, so reheating adds 19 gallons during the first hour. Among 481 heat pump models, 346 have a higher first-hour rating. The median heat pump model gives 72 gallons in the first hour of the test.

The single model number sold under it is ENERGY STAR certified. In the test, it gives 3.80 units of hot water energy per unit it uses (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 medium (its draw pattern). Among 226 heat pump models on its draw pattern, 54 have a higher UEF. On its draw pattern, the median heat pump UEF is 3.68. When it reheats water in the test, the water gains 452% of the energy it uses.

All of its test figures are shared by 4 other basic models. Each of them is listed under a different brand. You can find the whole group on the page for the A. O. Smith HPTS-50 2**.

It may qualify for 21 rebate programs. It may qualify for 7 more if it meets terms its figures do not show.