Ruud XE50M12CS55U1
0.92 UEF DOE CCD · 2026-09-19Grade G: 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 Ruud XE50M12CS55U1, an electric tank, this site computes 3,531 kWh of electricity a year for it. That figure applies at the medium draw pattern, the standard daily hot-water usage DOE tests against. It is equal to the class median of 3,531 kWh across 426 electric tank models at that draw pattern.
Energy use per year
3,531 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 3,531 kWh for the 426 models registered in the same heater type and draw pattern; it ranks 213 of 426, lowest energy first.
Solid line: this model (3,531 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
- 0.92 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
- 63 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 45 gal DOE CCD · 2026-09-19
What it costs to install
$1,721–$2,028 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 · 2026-09-24What 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 40-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 Ruud model on file
What this brand files, by heater type.
UEF 0.92 · Grade G Price it on your ZIP
The 3,531 kWh figure comes from this site's calculation. The registry does not publish it. The calculation combines the registry's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for the medium draw pattern. For the XE50M12CS55U1, the UEF is 0.92, taken from DOE CCD data retrieved 2026-09-19. The medium draw pattern stands for a typical mid-sized household with a busy morning of hot-water use. Among the 426 electric tank models registered at that draw pattern, this model ranks 213th lowest for energy use. Its difference from the class median of 3,531 kWh is 0 kWh, so it sits neither above nor below the middle of its class. The steps behind the annual figure are set out on the page about how this site calculates annual energy and cost.
The first hour rating, the gallons of hot water available in the first hour from a full tank, is 63 gallons for this model. Its rated volume is 45 gallons. The 3,531 kWh estimate fits a household whose daily use is close to the medium draw pattern. It does not describe a household that draws much more or much less hot water than the test assumes. Energy use at other draw levels is not available in this data, and this page does not estimate it. If a household's morning demand runs past the 63-gallon first hour rating, compare other sizes with the water heater selector by fuel, space and size. To check models in the same class as this one, use find a same-class replacement by model number.
Running cost is not stated in this text. It depends on the reader's own utility electricity tariff, which this page does not know. The cost block multiplies the 3,531 kWh figure by the rate for the reader's ZIP. Because this model's energy use is 0 kWh from the class median of 3,531 kWh, its running cost on any given rate matches that of a median model in the class. The price for another household depends on that household's own rate, and this page does not assume one. To see the figure for a specific address, use the running cost calculator for your own ZIP. The installed price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote.
DOE CCD · 2026-09-19