SANCO2 40-Gallon (GS5-45HPC HP + ECO-43SSAQB)
SANCO2 40-Gallon (GS5-45HPC HP + ECO-43SSAQB) is a heat pump (hybrid electric) water heater from SANCO2 with a 43 gallon rated tank and a 73 gallon first-hour rating at a 3.7 UEF.
| Uniform Energy Factor (UEF) | 3.7 |
|---|---|
| Annual electricity use | 868 kWh/yr |
| Fuel | Electric |
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| First-hour rating | 73 gal |
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| Rated storage volume | 43 gal |
| Draw pattern | Medium |
| Heat pump type | Split System HPWH |
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| Refrigerant (GWP) | R-744 (CO₂) (GWP:1 | Lower GWP) |
| Input voltage | 230 |
|---|---|
| Max current draw | 7 A |
| Smart / connected capable | No |
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| ENERGY STAR certified | Yes |
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Who is the SANCO2 40-Gallon (GS5-45HPC HP + ECO-43SSAQB) for?
- Its 73 gallon first-hour rating suits a household of 3–4 people under DOE sizing guidance.
- Estimated running cost: about $148/year at the national average electricity rate (868 kWh/yr certified use).
- Needs a 240 V circuit; at 7 A max draw plan for a 10 A breaker (NEC 125% continuous-load rule).
Similar water heaters
- Rinnai REHP50 50-Gallon (UEF 3.75)
- Rinnai REHP50 50-Gallon (REHP50C) (UEF 3.75)
- Rinnai REHP50BM 50-Gallon (UEF 3.75)
- SANCO2 40-Gallon (GS5-45HPC-D HP + ECO-43SSAQB) (UEF 3.7)
- A. O. Smith Split System Heat Pump 50-Gallon (HPACO-45 1-+AXST-50LBTTP 1) (UEF 3.55)
- A. O. Smith Split System Heat Pump 50-Gallon (HPACO-45C 1-+AXST-50LBCTTP 1) (UEF 3.55)
Frequently asked questions
Is the SANCO2 40-Gallon (GS5-45HPC HP + ECO-43SSAQB) ENERGY STAR certified?
Yes, the SANCO2 40-Gallon (GS5-45HPC HP + ECO-43SSAQB) holds a current ENERGY STAR certification for water heating efficiency (UEF 3.7).
How much does the SANCO2 40-Gallon (GS5-45HPC HP + ECO-43SSAQB) cost to run per year?
About $148 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 SANCO2 40-Gallon (GS5-45HPC HP + ECO-43SSAQB) need?
The SANCO2 40-Gallon (GS5-45HPC HP + ECO-43SSAQB) runs on a 240 V circuit drawing up to 7 A; per the NEC 125% continuous-load rule plan for at least a 10 A breaker (check the installation manual for the required circuit).
Is the SANCO2 40-Gallon (GS5-45HPC HP + ECO-43SSAQB) a smart water heater?
No, the SANCO2 40-Gallon (GS5-45HPC HP + ECO-43SSAQB) is not connected-capable — it has no app connectivity or demand-response support.
Sources
- data.energystar.gov (retrieved 2026-07-17)