Split-System Heat Pump Water Heaters

Heat pump water heaters with the compressor outdoors and the tank indoors — no indoor air-volume requirement and near-silent operation inside, including CO₂-refrigerant systems.

16 certified models in this category.

Model Uniform Energy Factor (UEF)FuelFirst-hour ratingMax flow rateRated storage volumeSmart / connected capable
A. O. Smith Split System Heat Pump 40-Gallon (HPACO-45 1-+AXST-50T 1) 3.52Electric67 gal—45 galYes
A. O. Smith Split System Heat Pump 50-Gallon (HPACO-45 1-+AXST-50LBTTP 1) 3.55Electric72 gal—48 galYes
A. O. Smith Split System Heat Pump 50-Gallon (HPACO-45 1-+AXST-50S 1) 3.52Electric70 gal—46 galYes
A. O. Smith Split System Heat Pump 65-Gallon (HPACO-45 1-+AXST-66 1) 3.7Electric82 gal—60 galYes
A. O. Smith Split System Heat Pump 80-Gallon (HPACO-45 1-+AXST-80 1) 3.8Electric95 gal—73 galYes
Eco-Logical OMNI-50HP1-1A 50-Gallon 3.3Electric50 gal—46 galYes
Eco-Logical OMNI-50HP2-1A 50-Gallon 4.23Electric57 gal—46 galYes
Eco-Logical OMNI-80HP2-1A 80-Gallon 4.11Electric82 gal—74 galYes
Reclaim Energy MP120F-RC 80-Gallon 3.75Electric121 gal—119 galNo
Reclaim Energy MP80F-RC 80-Gallon 3.8Electric98 gal—80 galNo
SANCO2 40-Gallon (GS5-45HPC-D HP + ECO-43SSAQB) 3.7Electric73 gal—43 galNo
SANCO2 80-Gallon (GS5-45HPC-D HP + ECO-119GLBK) 3.72Electric134 gal—119 galNo
SANCO2 80-Gallon (GS5-45HPC-D HP + ECO-83SSAQB) 3.8Electric121 gal—83 galNo
Smart Solar SSG2-ES 120 80-Gallon 2.85Electric83 gal—120 galNo
Smart Solar SSG2-ES 65 65-Gallon 2.52Electric46 gal—65 galNo
Smart Solar SSG2-ES 80 80-Gallon 2.71Electric55 gal—80 galNo