RELIANCE WATER HEATERS PETX-55 1**
0.94 UEF DOE CCD · 2026-09-19Grade G: where this UEF sits among the 194 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
An electric tank, high draw pattern (a larger household, or one where showers and laundry overlap).
If you are checking a listing, this electric tank uses 5,278 kWh of electricity a year at the high draw pattern, the standard daily hot-water usage DOE tests against. That is 3,972 kWh above the class median of 1,306 kWh. Its energy use ranks 172nd lowest of 194 models in the class.
Energy use per year
5,278 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 above the median of 1,306 kWh for the 194 models registered in the same heater type and draw pattern; it ranks 172 of 194, lowest energy first.
Solid line: this model (5,278 kWh). Dashed line: the class median.
Min 1,002 kWh Median 1,306 kWh Max 5,334 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 high draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- High 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
- 76 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 55 gal DOE CCD · 2026-09-19
What it costs to install
$1,879–$2,711 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 50-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 RELIANCE WATER HEATERS model on file
What this brand files, by heater type.
UEF 0.94 · Grade G Price it on your ZIP
The figure of 5,278 kWh is computed by this site, not the registry. It uses the registry's UEF, the ratio of hot water delivered to energy used, which is 0.94 for this model. The DOE test's daily hot-water draw for the high draw pattern completes the calculation. The source is DOE CCD, retrieved 2026-09-19. The comparison covers the 194 models registered as an electric tank at the high draw pattern. The class median is 1,306 kWh, so this model sits 3,972 kWh above it. Its rank of 172nd lowest places it in the highest quarter of its class for energy use.
The high draw pattern describes a larger household, or one where showers and laundry overlap. The first hour rating and rated volume are the supply figures to check against that use. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 76 gallons. Its rated volume is 55 gallons. Against that supply, the energy figure is 3,972 kWh above the class median of 1,306 kWh. A household that fits a different draw pattern should not read 5,278 kWh as its own use. The figure is tied to the federal test's daily draw, and measured use in an individual home is not available here. The water heater selector filters by fuel, space and size.
The running cost is not stated in the text, because it depends on your own utility electricity tariff. The cost calculator applies your ZIP to the 5,278 kWh figure. How the annual cost is calculated is explained on the methodology page. This model uses 3,972 kWh more than the class median of 1,306 kWh. At any given rate, its cost is therefore higher than that of a median model in the class. The modeled installed-cost range appears in its own block with its source and date, and it is not a quote. For a same-class replacement, search by model number.
DOE CCD · 2026-09-19