LG R5TT20F-SA0 (240V)
3.75 UEF DOE CCD · 2026-09-19Grade A: where this UEF sits among the 426 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
An electric tank, medium draw pattern (a typical three- or four-person household, about 55 gallons on a busy morning).
If you are checking the LG R5TT20F-SA0 (240V), this electric tank uses 866 kWh of electricity a year. That figure applies at the medium draw pattern, the standard daily hot-water usage DOE tests against. It is 2,665 kWh below the 3,531 kWh median of the 426 electric tank models registered at that pattern.
Energy use per year
866 kWh a year
Computed by this site from the registry's UEF and the federal test's daily hot-water draw for this draw pattern. What it costs depends on the electricity rate where you live.
That is below the median of 3,531 kWh for the 426 models registered in the same heater type and draw pattern; it ranks 21 of 426, lowest energy first.
Solid line: this model (866 kWh). Dashed line: the class median.
Min 773 kWh Median 3,531 kWh Max 3,569 kWh
What it costs to run where you live
What the registry files
- UEF (Uniform Energy Factor) how much hot water you get for each unit of energy the heater uses
- 3.75 DOE CCD · 2026-09-19 Compared only with other models registered as an electric tank at the medium draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- Medium DOE CCD · 2026-09-19
- First Hour Rating how many gallons of hot water the unit can deliver in one hour, starting from a full tank
- 66 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 52 gal DOE CCD · 2026-09-19
- On the market since (ENERGY STAR) the date the manufacturer told ENERGY STAR the model went on sale
- 2020-08-01 ENERGY STAR · 2026-09-19
- Connected / demand response (ENERGY STAR) whether the unit can take signals from your utility to shift when it heats, and by which standard (such as CTA-2045)
- No ENERGY STAR · 2026-09-19
- Refrigerant and GWP (ENERGY STAR) the refrigerant a heat pump unit uses and its global warming potential, a leak's climate effect relative to carbon dioxide (CO2 = 1)
- R-134a, GWP 1430 ENERGY STAR · 2026-09-19
What it costs to install
$3,251–$4,466 installed
Not a quote — a modeled range of what installers have charged for this class of unit; your price will vary with labor rates, access, and local code requirements.
Escalation indexes: equipment (BLS PPI) latest available: August 2026; labor (BLS ECI) latest available: April 2026 to June 2026.
NLR REMDB (BLS PPI/ECI escalated) · 2026-04-01Safety record
No CPSC recall names this model.
Checked against the CPSC recall database. CPSC does not publish a model-level match for this product category, so this list is curated by hand from the manufacturer's recall filings.
CPSC · 2026-09-24Does it fit your space?
Enter your own numbers below — this compares them to what ENERGY STAR publishes for this model, it does not tell you what to buy.
- Compressor operating range (ENERGY STAR)
- the air temperatures around the unit in which its heat pump runs; outside this range the heat pump stops
- Dimensions (ENERGY STAR)
- the unit's filed height, width, depth or tank diameter, in inches
- Input voltage and maximum current (ENERGY STAR)
- the circuit voltage the unit is certified on and the most current it draws
What these figures mean
How this compares
The closest models in the same class — same fuel, type and draw pattern.
Keep going
How every figure on this page is calculated
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Find what replaces your water heater
Enter the model number off your old unit and see what is on file today, with the yearly cost difference.
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Find a water heater that fits
Three questions — fuel, hot water need, install space — narrow every model on file to the ones that fit.
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What a water heater costs to run
Prices a unit's efficiency against your own utility's filed tariff for your ZIP code.
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What size heat pump water heater do I need?
Answered from what models in this size actually file.
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Water heaters
Every model on file with the Department of Energy, by heater type.
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All heat pump water heaters
Electric tanks that file a UEF of 2.0 or more — the registry has no separate heat pump type, so this site draws the line there.
UEF 3.75 · Grade A Price it on your ZIP
The registry does not list the 866 kWh figure. This site calculated it from two inputs: the model's UEF, the ratio of hot water delivered to energy used, and the DOE test's daily hot-water draw for the medium pattern. The registry lists a UEF of 3.75 for this model. The value was taken from the DOE CCD on 2026-09-19. The result applies only at the federal test's daily draw. It is not a measurement taken in any particular home. A household that uses a different amount of hot water each day will not match 866 kWh exactly. The data here does not show how far such a household would differ. The page on how the annual cost is calculated lists the same inputs in order.
The comparison group is the 426 models registered as an electric tank at the medium draw pattern. Within that group, this model ranks 21st lowest in energy use. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 66 gallons. Its rated volume is 52 gallons. The figures fit a household whose daily use is close to the medium test draw and whose morning demand stays within 66 gallons in an hour. A home that needs more than that in one hour, or that wants a different fuel, falls outside this comparison. The selector by fuel, space and size covers those cases. To find another model in the same class, try a same-class replacement search by model number.
This text does not give the running cost because it depends on your own electricity tariff. The cost calculator for your own ZIP multiplies 866 kWh by the rate for your area. You can apply the same rate to the 3,531 kWh class median. That turns the 2,665 kWh yearly gap from the answer above into a cost on your tariff. Both figures still assume the medium draw pattern. The installed-price range appears in a separate block on this page, with its source and date. It is a modeled range of installed cost, not a quote from a contractor. For a specific address, that figure is not available.
DOE CCD · 2026-09-19