Custom Comfort CCOHPWH80A

It holds 74 gallons in the test, 6 gallons less than its 80-gallon sold size. It delivers 91 gallons of hot water in the test's first hour. That is 17 gallons more than its tank holds, since it reheats during the hour. Among 481 heat pump models, 43 have a higher first-hour rating. The median heat pump model gives 72 gallons in its first hour.

Its single model number, CCOHPWH80A, is ENERGY STAR certified. In the test, it gives 4.00 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. The daily hot water use in the test, called its draw pattern, was high. Among 237 heat pump models on its draw pattern, 70 have a higher UEF. For its type and draw pattern, the median UEF is 3.88. When it reheats water in the test, the water gains 450% of the energy it uses.

All of its test figures are shared by 16 other basic models. In all, 15 other brands list one or more of them. For the full group, see the 1HVAC ACIQ-80G-HP-WH.

In 19 states, 20 rebate programs may accept it. Another 7 programs may accept it if it meets their other terms.