LG R5TT20F-SA0 50-Gallon (R5TT20F-SA0 (208V))
LG R5TT20F-SA0 50-Gallon (R5TT20F-SA0 (208V)) is a heat pump (hybrid electric) water heater from LG with a 52 gallon rated tank and a 66 gallon first-hour rating at a 3.75 UEF.
| Uniform Energy Factor (UEF) | 3.75 |
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| Annual electricity use | 866 kWh/yr |
| Recovery efficiency | 365 % |
| Fuel | Electric |
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| First-hour rating | 66 gal |
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| Rated storage volume | 52 gal |
| Draw pattern | Medium |
| Heat pump type | 240 Volt Integrated HPWH |
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| Refrigerant (GWP) | R-134a (GWP:1430) |
| Compressor low-temp cutoff | 23 °F |
| Input voltage | 208 |
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| Max current draw | 24 A |
| Smart / connected capable | No |
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| Height | 47.6 in |
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| Diameter | 19.7 in |
| ENERGY STAR certified | Yes |
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Who is the LG R5TT20F-SA0 50-Gallon (R5TT20F-SA0 (208V)) for?
- Its 66 gallon first-hour rating suits a household of 3–4 people under DOE sizing guidance.
- Estimated running cost: about $147/year at the national average electricity rate (866 kWh/yr certified use).
- Needs a 240 V circuit; at 24 A max draw plan for a 30 A breaker (NEC 125% continuous-load rule).
- The heat pump compressor operates down to 23 °F ambient — below that, backup elements take over.
Similar water heaters
- A. O. Smith Heat Pump 50-Gallon (FPTU-50 1) (UEF 3.35)
- A. O. Smith Heat Pump 50-Gallon (HP1050H45DV 1) (UEF 3.45)
- A. O. Smith Heat Pump 50-Gallon (HP1050H45DVCTA-1) (UEF 3.45)
- A. O. Smith Heat Pump 50-Gallon (HPTU-50CTA 1) (UEF 3.45)
- A. O. Smith Heat Pump 50-Gallon (HPTU-50DR 1) (UEF 3.45)
- A. O. Smith Heat Pump 50-Gallon (HPTU-50N 1) (UEF 3.45)
Frequently asked questions
Is the LG R5TT20F-SA0 50-Gallon (R5TT20F-SA0 (208V)) ENERGY STAR certified?
Yes, the LG R5TT20F-SA0 50-Gallon (R5TT20F-SA0 (208V)) holds a current ENERGY STAR certification for water heating efficiency (UEF 3.75).
How much does the LG R5TT20F-SA0 50-Gallon (R5TT20F-SA0 (208V)) cost to run per year?
About $147 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 LG R5TT20F-SA0 50-Gallon (R5TT20F-SA0 (208V)) need?
The LG R5TT20F-SA0 50-Gallon (R5TT20F-SA0 (208V)) runs on a 240 V circuit drawing up to 24 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 LG R5TT20F-SA0 50-Gallon (R5TT20F-SA0 (208V)) a smart water heater?
No, the LG R5TT20F-SA0 50-Gallon (R5TT20F-SA0 (208V)) is not connected-capable — it has no app connectivity or demand-response support.
Sources
- data.energystar.gov (retrieved 2026-07-17)