RELIANCE WATER HEATERS ENJ-40 1**
0.93 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 RELIANCE WATER HEATERS ENJ-40 1**, this electric tank uses 3,493 kWh of electricity a year. That figure belongs to the medium draw pattern, the standard daily hot-water usage DOE tests against. It sits 38 kWh below the class median of 3,531 kWh, ranking 153rd lowest energy use of 426 comparable models.
Energy use per year
3,493 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 153 of 426, lowest energy first.
Solid line: this model (3,493 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
- 0.93 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
- 35 gal DOE CCD · 2026-09-19
What it costs to install
$1,583–$1,994 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 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 RELIANCE WATER HEATERS model on file
What this brand files, by heater type.
UEF 0.93 · Grade G Price it on your ZIP
This site computed the 3,493 kWh figure. It was not taken directly from the registry. It 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. The UEF for this model is 0.93. The registry data comes from the DOE Compliance Certification Database, retrieved 2026-09-19. The figure applies only at the federal test's daily draw. A household that draws more or less hot water will use a different amount of electricity. The registry data gives no uncertainty range for this figure, so none is shown here. The page on how the annual cost is calculated sets out each step of the method.
DOE uses the medium draw pattern to represent a typical family household with a busy morning of hot-water use. This unit's first hour rating, the gallons of hot water available in the first hour from a full tank, is 54 gallons. Its rated volume is 35 gallons. The 3,493 kWh figure reflects the conditions of a household whose morning use fits within that first hour rating. The rank of 153rd of 426 compares this model only with electric tanks at the medium draw pattern. If you are checking against a unit being replaced, you can find a same-class replacement by model number and keep the comparison inside this class.
The figure does not describe a household that regularly draws more hot water than the medium pattern assumes. The registry data for this model does not include energy use at other draw patterns, so this page gives no such figure. This text also does not state the running cost. The running cost depends on your own utility electricity tariff applied to the 3,493 kWh a year, and tariffs differ by utility. The cost calculator on your own ZIP works it out from your rate. The installed-cost block on this page shows a modeled range, not a quote, and lists its own source and date.
DOE CCD · 2026-09-19