ECO-AIR HPWH-50G

It holds 47 gallons in the test, 3 gallons less than its 50-gallon sold size. Starting full, it gives 69 gallons of hot water in its first hour of use. Reheating lets it give 22 gallons beyond the 47 gallons in its tank. In the first hour, 263 of the 481 heat pump models give more hot water. The median heat pump model gives 72 gallons in its first hour.

The single model number sold under it is ENERGY STAR certified. In the test, it delivered 3.75 units of hot water energy for each unit used (its UEF). Pulling heat from the air lets its UEF pass 1. Its test ran at the medium level of daily hot water use. Of 226 heat pump models with the same draw pattern, 59 have a higher UEF. On its draw pattern, the median heat pump UEF is 3.68. While it reheats, the water gains 430% of the energy it uses (its recovery efficiency).

All of its test figures are shared by 19 other basic models. Between them, those basic models carry 17 other brand names. For the full group, see the 1HVAC ACIQ-50G-HP-WH.

It may qualify for 21 rebate programs in 20 states. It may qualify for 7 more if it meets terms its figures do not show.