LG WT7400C
Filed with DOE as WT7400C*. An asterisk in a model number stands for any character: this one filing covers several variants.
588 kWh a year DOE CCD (opens in a new tab) (the U.S. Department of Energy’s Compliance Certification Database) · 2026-10-25with an electric water heater and an electric dryer
IMEF 2.76 filed efficiency; the yearly figure is computed from it
A top-loading washer of standard size (1.6 cubic feet or more). Drum: 5.5 cubic feet.
Label numbers this filing covers (2)
The model number on your rating plate may be any of these; each is filed under this one listing.
- WT7400C*
- WT7480C*
Checking the LG WT7400C*: at DOE's test use it takes 588 kWh a year with an electric water heater and an electric dryer. Its yearly water use at that test use is 5,192 gallons. Its IMEF, the cubic feet of laundry washed per kilowatt-hour, dryer included, is 2.76, above its class median of 1.57.
Energy and water per year
588 kWh a year with an electric water heater and an electric dryer
Computed by this site from the registry's IMEF and drum capacity at DOE's test use of 295 cycles a year. IMEF counts the washer, heating its water electrically, and the electric dryer's work on what the spin leaves wet — so this is the total for that kind of home. How it is calculated
The machine and its hot water alone, dryer not included: 130 kWh a year, as ENERGY STAR files it.
Not published: A home with a gas water heater, a gas dryer or line drying
DOE's rating assumes electric water heating and an electric dryer and files no split between the machine, the water heating and the drying.
Such a home uses less electricity than the total above; how much less, no registry says for this model.
5,192 gallons of water a year
Computed from the registry's IWF and drum capacity at the same 295 cycles a year.
Not published: What the water costs
water and sewer rates are set by thousands of local utilities and no free national source publishes them.
The gallons above are the figure to multiply by your own water and sewer rate.
This model is rated above the federal minimum IMEF for its class.
DOE CCD (opens in a new tab) · 2026-10-25What it costs to run where you live
See what the middle washer of each product class costs to run on your rate.
What the registry files
From DOE CCD · 2026-10-25
- IMEF (Integrated Modified Energy Factor) how many cubic feet of drum a washer cleans for each kilowatt-hour, counting the machine, heating the water and drying what the spin leaves wet
- 2.76 Compared only with other top-loading, standard size washers.
- IWF (Integrated Water Factor) how many gallons of water a washer uses per cycle for each cubic foot of drum
- 3.2
- Clothes container capacity the volume of the drum in cubic feet, as DOE's test measures it
- 5.5 ft³
- Federal minimum IMEF for this class
- 1.57
From ENERGY STAR · 2026-10-25
- ENERGY STAR
- ENERGY STAR certified.
Installed cost and service life
$1,183–$1,691 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.
Brought to current prices with Bureau of Labor Statistics indexes: equipment to August 2026, installation labor to April 2026–June 2026.
NLR REMDB (BLS PPI/ECI escalated) · 2026-04-01Service life: DOE’s cost database assumes 11 years for top-loading washers. That is a class assumption, not this model’s rating or a warranty — no registry publishes either.
NLR REMDB v4.0.0 · 2026-09-29Safety 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 · 2026-09-29What these figures mean
Where the hot water in this figure comes from
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Water heaters
The other big user of hot water in a home, with every model on file.
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What a water heater costs to run
Prices a water heater’s efficiency against your own utility’s tariff.
Closest in its class
- LG WT5480C…+ 534 kWh a year
- LG WT7300C 534 kWh a year
- LG WT7700H…A 609 kWh a year
- LG WT7800C 588 kWh a year
Keep going
How every figure on this page is calculated
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Top-load washers ranked by filed efficiency (IMEF)
Ranked by filed IMEF inside each class, recalled models left out.
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Most energy-efficient clothes washers
Ranked by filed IMEF inside each class, recalled models left out.
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Top load vs front load washing machine
The filed IMEF, yearly energy, water, drum size and installed-cost range of every standard-size top-loading and front-loading washer, side by side from the DOE registry.
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How much water and electricity does a washing machine use?
The yearly gallons and kWh of every residential washer on file, by product class with the full spread, plus the exact per-cycle figures, and the watts no registry files declared as a gap.
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Every LG washer on file
What the brand files, by product class.
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Every clothes washer on file
All four product classes, from the DOE registry.
The 588 kWh figure is not printed in the DOE registry. This site computes it from the registry's IMEF and the capacity, the drum's volume in cubic feet, which is 5.5 for this model. It assumes an electric water heater and an electric dryer. ENERGY STAR files a separate machine-only figure of 130 kWh a year for this model. That figure covers the washer and its electrically heated water alone, with the dryer left out. So of the 588 kWh total, everything above 130 kWh is the dryer's share at the same test use. Figures for a home with a gas water heater or a gas dryer are not available here. The registry data was retrieved on 2026-10-25, and how the yearly energy and water figures are calculated sets out each step.
Read the rest
The 5,192 gallons figure comes from the registry's IWF, the gallons of water used per cycle for each cubic foot of drum. This model's IWF is 3.2, and this site multiplies it by the 5.5 cubic foot capacity over a year of DOE test use. A household that runs more or fewer loads than the test use will use a different amount, which is not available here. No cost is shown for the 5,192 gallons, because no free national source publishes local water and sewer rates. A reader can apply the rate from their own water and sewer bill to the gallon figure. The installed price range has its own block on this page, with its source and date. It is a modeled range, not a quote.
Among the 870 models registered as top-loading, standard size, this model has the 1st highest IMEF. The class median IMEF is 1.57, so this model's 2.76 sits above the median. In the same class, 652 models are rated at the federal minimum IMEF, while this one is rated above that minimum. The rank reflects the registry's IMEF only and covers no other feature of the machine. Running cost is not stated in this text, because it depends on the reader's own electricity tariff. The page therefore computes it from the reader's ZIP rather than naming an amount. At any tariff, that calculation starts from the 588 kWh yearly figure. The same model is also sold as WT7480C*. Other top-loading models appear among all clothes washer pages.