Rheem PROE28 S2 RH93 SB-HO
0.94 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 PROE28 S2 RH93 SB-HO, it uses an estimated 3,456 kWh of electricity a year at the medium draw pattern, the standard daily hot-water usage DOE tests against. That is 75 kWh below the 3,531 kWh median of the 426 electric tank models registered at the same draw pattern.
Energy use per year
3,456 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 137 of 426, lowest energy first.
Solid line: this model (3,456 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
- 0.94 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
- 53 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 Rheem model on file
What this brand files, by heater type.
UEF 0.94 · Grade G Price it on your ZIP
This site computes the 3,456 kWh figure; the registry does not publish it. The figure combines the registry's UEF, the ratio of hot water delivered to energy used, with the daily hot-water draw that the DOE test sets for the medium draw pattern. For the Rheem PROE28 S2 RH93 SB-HO, the UEF is 0.94. The registry values come from the DOE Compliance Certification Database (CCD), retrieved 2026-09-19. The annual figure applies only at the test's daily draw, and it is measured in electricity, the fuel this unit uses. The methodology page sets out the steps behind the annual energy and cost figures.
Within its class, the Rheem PROE28 S2 RH93 SB-HO ranks 137th lowest in energy use among 426 electric tank models at the medium draw pattern. Its 3,456 kWh sits 75 kWh below the class median of 3,531 kWh. The medium draw pattern represents a typical household on a busy morning. The unit's first hour rating, the gallons of hot water available in the first hour from a full tank, is 53 gallons. Its rated volume is 26 gallons. The first hour rating describes peak-hour supply and does not enter the annual figure. To check other electric tank models at this draw pattern, you can find a same-class replacement by model number.
A household that draws more hot water each day than the DOE test assumes falls outside this figure. Its yearly use will be higher than 3,456 kWh. This rating also does not cover a household whose busiest hour needs more than 53 gallons. The text does not state the running cost, because it depends on your own utility's electricity tariff. The cost calculator on your own ZIP applies your local rate to 3,456 kWh. An installed price range is not available for this model either. Its ratings lie outside the range that the cost database's model was fitted on, and the page does not stretch that range to cover them.
DOE CCD · 2026-09-19