Rheem 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 Rheem XE50M12CS55U1, an electric tank, it uses 3,531 kWh of electricity a year. That figure is for the medium draw pattern, the standard daily hot-water usage DOE tests against. It equals its class median of 3,531 kWh, a difference of 0 kWh, and ranks 213th lowest of 426 comparable models.
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 Rheem model on file
What this brand files, by heater type.
UEF 0.92 · Grade G Price it on your ZIP
The registry does not list the 3,531 kWh figure. This site calculated it from two inputs. The first is the model's UEF, the ratio of hot water delivered to energy used. The second is the DOE test's daily hot-water draw for the medium pattern. The UEF input is 0.92, taken from the DOE Compliance Certification Database and retrieved 2026-09-19. The medium pattern represents a typical household with a busy morning of hot-water use. The annual figure is valid only at that test draw. A home that uses more hot water each day will use more electricity than 3,531 kWh, and a home that uses less will use less. This page does not show how large that change would be for a particular household. The full method is in how the annual cost is calculated.
The XE50M12CS55U1 is compared with 426 models registered as an electric tank at the medium draw pattern. Its 3,531 kWh is 0 kWh away from the class median of 3,531 kWh. Its rank of 213th lowest puts it in the middle of that class, not at either end. The tank has a rated volume of 45 gallons. It also has a first hour rating, the gallons of hot water available in the first hour from a full tank, of 63 gallons. Together, these figures suit a household whose daily hot-water use is close to the medium test pattern. They do not suit a household that needs more than 63 gallons in its busiest hour, because that is more than the rating covers. You can compare other models by fuel, space and size in the water heater selector.
The text gives no running cost for the XE50M12CS55U1. The cost of 3,531 kWh of electricity depends on your own utility tariff, and rates differ by utility and by plan. Instead, the page calculates the cost from your ZIP code in the cost calculator for your own ZIP. That result still assumes the medium draw pattern and a UEF of 0.92. The installed-cost range in its own block on this page is a modeled range with its source and date. It is not a quote. If you are matching this unit for a replacement, you can find a same-class replacement by model number. You can then compare that model's annual energy use with the class median of 3,531 kWh.
DOE CCD · 2026-09-19