Ruud PROE47 S2 RH CG
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).
The Ruud PROE47 S2 RH CG, an electric tank water heater, uses 3,531 kWh of electricity a year at the medium draw pattern, the standard daily hot-water usage DOE tests against. If you are checking a listing or a quote, that figure is equal to its class median of 3,531 kWh, a difference of 0 kWh.
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
- 54 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 43 gal DOE CCD · 2026-09-19
What it costs to install
$1,692–$1,978 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 is calculated by this site. The registry does not publish it. The calculation uses the registry's UEF, the ratio of hot water delivered to energy used, and the daily hot-water draw that the DOE test sets for the medium draw pattern. For this model the UEF is 0.92. The source record comes from the DOE Compliance Certification Database, retrieved 2026-09-19. The medium pattern stands for a typical household's daily hot-water use, including a busy morning, as DOE defines it for testing. The figure applies only at that test draw. If your household uses more or less hot water each day, your yearly electricity use will differ from 3,531 kWh. This page has no data on how large that difference would be. The page on how this site calculates annual energy and cost sets out each step.
The comparison group is the 426 models registered as an electric tank at the medium draw pattern. In that group, this model ranks 213th lowest for energy use, which places it in the second-lowest quarter of its class. Its 3,531 kWh is equal to the class median of 3,531 kWh, a difference of 0 kWh. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 54 gallons, from a rated volume of 43 gallons. The rating covers a household that needs no more than 54 gallons in its busiest hour. If a household needs more than that in one hour, it goes beyond what the rating covers. To check other models in the same class, you can find a same-class replacement by model number.
The running cost does not appear in this text. The cost of 3,531 kWh of electricity depends on your own utility tariff. The cost calculator for your own ZIP applies your local electricity rate to this model's yearly use at the medium draw pattern. Without your tariff, the cost for this model is unknown, and this page does not estimate it. To compare this model with another one, use each model's own annual energy at the same draw pattern and the same rate. Its rank of 213th does not give a cost. The installed-price block on this page shows a modeled installed-cost range with its own source and date. That range is not a quote for this model.
DOE CCD · 2026-09-19