RELIANCE WATER HEATERS Split System Heat Pump 40-Gallon (RHPCO-45 1-+RXST-50TG 1)
RELIANCE WATER HEATERS Split System Heat Pump 40-Gallon (RHPCO-45 1-+RXST-50TG 1) is a heat pump (hybrid electric) water heater from RELIANCE WATER HEATERS with a 45 gallon rated tank and a 67 gallon first-hour rating at a 3.52 UEF.
| Uniform Energy Factor (UEF) | 3.52 |
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| Annual electricity use | 923 kWh/yr |
| Recovery efficiency | 413 % |
| Fuel | Electric |
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| First-hour rating | 67 gal |
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| Rated storage volume | 45 gal |
| Draw pattern | Medium |
| 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 | 57 in |
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| Diameter | 16 in |
| ENERGY STAR certified | Yes |
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Who is the RELIANCE WATER HEATERS Split System Heat Pump 40-Gallon (RHPCO-45 1-+RXST-50TG 1) for?
- Its 67 gallon first-hour rating suits a household of 3–4 people under DOE sizing guidance.
- Estimated running cost: about $157/year at the national average electricity rate (923 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 Split System Heat Pump 40-Gallon (HPACO-45 1-+AXST-50T 1) (UEF 3.52)
- A. O. Smith Split System Heat Pump 40-Gallon (HPACO-45 1-+AXST-50TTTP 1) (UEF 3.52)
- A. O. Smith Split System Heat Pump 40-Gallon (HPACO-45C 1-+AXST-50TC 1) (UEF 3.52)
- A. O. Smith Split System Heat Pump 40-Gallon (HPACO-45C 1-+AXST-50TCTTP 1) (UEF 3.52)
- American Split System Heat Pump 40-Gallon (MHPCO-45 1-+MXST-50T 1) (UEF 3.52)
- American Split System Heat Pump 40-Gallon (MHPCO-45 1-+MXST-50TTTP 1) (UEF 3.52)
Frequently asked questions
Is the RELIANCE WATER HEATERS Split System Heat Pump 40-Gallon (RHPCO-45 1-+RXST-50TG 1) ENERGY STAR certified?
Yes, the RELIANCE WATER HEATERS Split System Heat Pump 40-Gallon (RHPCO-45 1-+RXST-50TG 1) holds a current ENERGY STAR certification for water heating efficiency (UEF 3.52).
How much does the RELIANCE WATER HEATERS Split System Heat Pump 40-Gallon (RHPCO-45 1-+RXST-50TG 1) cost to run per year?
About $157 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 RELIANCE WATER HEATERS Split System Heat Pump 40-Gallon (RHPCO-45 1-+RXST-50TG 1) need?
The RELIANCE WATER HEATERS Split System Heat Pump 40-Gallon (RHPCO-45 1-+RXST-50TG 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 RELIANCE WATER HEATERS Split System Heat Pump 40-Gallon (RHPCO-45 1-+RXST-50TG 1) a smart water heater?
Yes, the RELIANCE WATER HEATERS Split System Heat Pump 40-Gallon (RHPCO-45 1-+RXST-50TG 1) is connected-capable, with app control and eligibility for most utility demand-response programs.
Sources
- data.energystar.gov (retrieved 2026-07-17)