Rheem XE65T10H45U1

It holds 59 gallons in the test, 6 gallons less than its 65-gallon sold size. Starting full, it gives 75 gallons of hot water in its first hour of use. That is 16 gallons more than its tank holds, since it reheats during the hour. Of 481 heat pump models, 193 give more hot water in the first hour. The median heat pump model gives 72 gallons in the first hour of the test.

Its single model number, XE65T10H45U1, is ENERGY STAR certified. For each unit of energy it uses, 4.05 units end up in the hot water (its UEF). It moves heat from the air rather than making it, so its UEF passes 1. Its test simulated a day of high hot water use (its draw pattern). Its UEF is lower than that of 32 of the 237 heat pump models with its draw pattern. For its type and draw pattern, the UEF runs from 2.85 to 4.95. While it reheats, the water gains 457% of the energy it uses (its recovery efficiency).

There are 29 more basic models with the same test figures. Those basic models are sold with Friedrich, Richmond, and Ruud as their brand names. You can find the whole group on the page for the Rheem PROPH65 T2 RH375-SO.

In 19 states, 20 rebate programs may accept it. It may qualify for 7 more if it meets terms its figures do not show.