MRCOOL MTWH04528EL
0.92 UEF DOE CCD · 2026-09-19Grade G: where this UEF sits among the 163 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
An electric tank, low draw pattern (a one- or two-person household).
If you are verifying the MRCOOL MTWH04528EL, it uses 2,439 kWh of electricity a year at the federal test's daily hot-water draw. That figure belongs to the low draw pattern, the standard daily hot-water usage DOE tests against, here a one- or two-person household. It equals its class median of 2,439 kWh, a difference of 0 kWh.
Energy use per year
2,439 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 equal to the median of 2,439 kWh for the 163 models registered in the same heater type and draw pattern; it ranks 19 of 163, lowest energy first.
Solid line: this model (2,439 kWh). Dashed line: the class median.
Min 724 kWh Median 2,439 kWh Max 2,550 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
- 0.92 DOE CCD · 2026-09-19 Compared only with other models registered as an electric tank at the low draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- Low 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
- 45 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 26 gal DOE CCD · 2026-09-19
What it costs to install
Not published: Installed cost range
This model's rated tank size lies outside the range NLR REMDB's cost model was fitted on, and the range is not stretched past it.
The annual energy figure on this page does not depend on this range and is unaffected.
Safety 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 · 2026-09-24What 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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Is a 30-gallon water heater enough?
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 electric resistance tank water heaters
Electric tanks that file a UEF below 2.0 — heated by elements, not a heat pump.
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Every MRCOOL model on file
What this brand files, by heater type.
UEF 0.92 · Grade G Price it on your ZIP
This site calculated the 2,439 kWh figure. The registry does not publish it. The calculation starts from the registry's UEF, the ratio of hot water delivered to energy used. For this electric tank, the UEF is 0.92. The second input is the DOE test's daily hot-water draw for the low draw pattern. Both inputs come from the DOE CCD, retrieved 2026-09-19. The test fixes the daily draw, so the figure describes that test condition and not a particular home. A household that uses more hot water than the low pattern assumes will use more electricity than 2,439 kWh. How much more is not available from this data. Each step is set out in how the annual energy and cost figures are calculated.
This model is compared with the 163 models registered as an electric tank at the low draw pattern. Among them, it ranks 19th lowest for energy use, which puts it in the lowest quarter of its class. Its 2,439 kWh is 0 kWh away from the class median of 2,439 kWh. The tank's rated volume is 26 gallons. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 45 gallons. A household that needs more than 45 gallons in its busiest hour falls outside what this rating covers. To check other units in the same class, use the same-class replacement search by model number.
This page does not state a running cost, because the cost depends on your own utility's electricity tariff. The running cost calculator for your ZIP works it out from 2,439 kWh and the tariff for your area. That result applies only at the test draw for the low draw pattern. An installed price range for the MTWH04528EL is not published. This model's ratings fall outside the range the cost database's model was fitted on. The site does not extend that model beyond its range, so no installed price is shown. It is unknown whether this unit's installed price differs from that of other models in its class.
DOE CCD · 2026-09-19