American Split System Heat Pump 65-Gallon (MHPCO-45 1-+MXST-66TTP 1)
American Split System Heat Pump 65-Gallon (MHPCO-45 1-+MXST-66TTP 1) is a heat pump (hybrid electric) water heater from American with a 60 gallon rated tank and a 82 gallon first-hour rating at a 3.7 UEF.
| Uniform Energy Factor (UEF) | 3.7 |
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| Annual electricity use | 1341 kWh/yr |
| Recovery efficiency | 435 % |
| Fuel | Electric |
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| First-hour rating | 82 gal |
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| Rated storage volume | 60 gal |
| Draw pattern | High |
| Heat pump type | Split System HPWH |
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| Refrigerant (GWP) | R-744 (CO₂) (GWP:1 | Lower GWP) |
| Compressor low-temp cutoff | 1 °F |
| Input voltage | 240 |
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| Max current draw | 20.2 A |
| Smart / connected capable | Yes |
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| Height | 59 in |
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| Diameter | 18 in |
| ENERGY STAR certified | Yes |
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Who is the American Split System Heat Pump 65-Gallon (MHPCO-45 1-+MXST-66TTP 1) for?
- Its 82 gallon first-hour rating suits a household of 5+ people under DOE sizing guidance.
- Estimated running cost: about $228/year at the national average electricity rate (1341 kWh/yr certified use).
- Needs a 240 V circuit; at 20.2 A max draw plan for a 30 A breaker (NEC 125% continuous-load rule).
- The heat pump compressor operates down to 1 °F ambient — below that, backup elements take over.
Similar water heaters
- A. O. Smith Heat Pump 65-Gallon (HPS10-66H45DV 2) (UEF 3.7)
- A. O. Smith Heat Pump 65-Gallon (HPSN10-66H45DV 2) (UEF 3.7)
- A. O. Smith Heat Pump 65-Gallon (HPTS-66 2) (UEF 3.7)
- A. O. Smith Split System Heat Pump 65-Gallon (HPACO-45 1-+AXST-66 1) (UEF 3.7)
- A. O. Smith Split System Heat Pump 65-Gallon (HPACO-45 1-+AXST-66TTP 1) (UEF 3.7)
- A. O. Smith Split System Heat Pump 65-Gallon (HPACO-45C 1-+AXST-66C 1) (UEF 3.7)
Frequently asked questions
Is the American Split System Heat Pump 65-Gallon (MHPCO-45 1-+MXST-66TTP 1) ENERGY STAR certified?
Yes, the American Split System Heat Pump 65-Gallon (MHPCO-45 1-+MXST-66TTP 1) holds a current ENERGY STAR certification for water heating efficiency (UEF 3.7).
How much does the American Split System Heat Pump 65-Gallon (MHPCO-45 1-+MXST-66TTP 1) cost to run per year?
About $228 per year at national average energy rates, based on its certified annual energy use under the DOE test draw pattern. Your rate and usage change this figure.
What electrical circuit does the American Split System Heat Pump 65-Gallon (MHPCO-45 1-+MXST-66TTP 1) need?
The American Split System Heat Pump 65-Gallon (MHPCO-45 1-+MXST-66TTP 1) runs on a 240 V circuit drawing up to 20.2 A; per the NEC 125% continuous-load rule plan for at least a 30 A breaker (check the installation manual for the required circuit).
Is the American Split System Heat Pump 65-Gallon (MHPCO-45 1-+MXST-66TTP 1) a smart water heater?
Yes, the American Split System Heat Pump 65-Gallon (MHPCO-45 1-+MXST-66TTP 1) is connected-capable, with app control and eligibility for most utility demand-response programs.
Sources
- data.energystar.gov (retrieved 2026-07-17)