LG R5TT20F-SA0 50-Gallon (R5TT20F-SA0 (240V)) 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 — 866 kWh/yr certified use, 47.6 in tall.
Efficiency
Uniform Energy Factor (UEF)
3.75
Annual electricity use
866 kWh/yr
Recovery efficiency
365 %
General
Fuel
Electric
Capacity
First-hour rating
66 gal
Rated storage volume
52 gal
Draw pattern
Medium
Heat pump
Heat pump type
240 Volt Integrated HPWH
Refrigerant (GWP)
R-134a (GWP:1430)
Compressor low-temp cutoff
23 °F
Installation
Input voltage
240
Max current draw
24 A
Smart features
Smart / connected capable
No
Dimensions
Height
47.6 in
Diameter
19.7 in
Certification
ENERGY STAR certified
Yes
Who is the LG R5TT20F-SA0 50-Gallon (R5TT20F-SA0 (240V)) 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.
Is the LG R5TT20F-SA0 50-Gallon (R5TT20F-SA0 (240V)) ENERGY STAR certified?
Yes, the LG R5TT20F-SA0 50-Gallon (R5TT20F-SA0 (240V)) holds a current ENERGY STAR certification for water heating efficiency (UEF 3.75).
How much does the LG R5TT20F-SA0 50-Gallon (R5TT20F-SA0 (240V)) 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 (240V)) need?
The LG R5TT20F-SA0 50-Gallon (R5TT20F-SA0 (240V)) 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 (240V)) a smart water heater?
No, the LG R5TT20F-SA0 50-Gallon (R5TT20F-SA0 (240V)) is not connected-capable — it has no app connectivity or demand-response support.
