Ruud PROPH50 T0 RH120-M

It holds 46 gallons in the test, 4 gallons less than its 50-gallon sold size. It delivers 55 gallons of hot water in the test's first hour. That is 9 gallons more than its tank holds, since it reheats during the hour. In the first hour, 418 of the 481 heat pump models give more hot water. The median heat pump model gives 72 gallons in its first hour.

Under this basic model, 2 model numbers are ENERGY STAR certified. For each unit of energy it uses, 3.00 units end up in the hot water (its UEF). Pulling heat from the air lets its UEF pass 1. In the test, daily hot water use was set to medium (its draw pattern). Among 226 heat pump models on its draw pattern, 208 have a higher UEF. On its draw pattern, the median heat pump UEF is 3.68. While it reheats, the water gains 367% of the energy it uses (its recovery efficiency).

It is the basic model for PROUH50 T0 RU120-M and PROUH50 T0 RU120-MSO. There are 3 more basic models with the same test figures. The Friedrich, Rheem, and Richmond brands list one or more of them. You can find the whole group on the page for the Rheem PROPH50 T0 RH120-M.

It may qualify for 19 rebate programs in 20 states. Another 5 programs may accept it if it meets their other terms.