RELIANCE WATER HEATERS ENLB-40 1**
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).
You are checking the RELIANCE WATER HEATERS ENLB-40 1**, an electric tank. At the medium draw pattern, the standard daily hot-water usage DOE tests against, it uses 3,531 kWh of electricity a year. That is 0 kWh from the class median of 3,531 kWh, across the 426 electric tanks registered at this draw pattern.
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
- 51 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
$1,576–$1,777 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 0.92 · Grade G Price it on your ZIP
This site computes the 3,531 kWh figure; the registry does not publish it. The calculation uses the registry's UEF, the ratio of hot water delivered to energy used. For this model the UEF is 0.92. The calculation also uses the DOE test's daily hot-water draw for the medium pattern. That pattern represents a typical household with a busy morning of hot-water use. The inputs come from the DOE CCD, retrieved 2026-09-19. This model ranks 213th lowest for energy use among the 426 electric tanks registered at this draw pattern. That places it in the second-lowest quarter of its class. The page on how the annual cost is calculated sets out each step behind the annual figure.
Every figure on this page applies only at the medium draw pattern. The registry lists a first hour rating, the gallons of hot water available in the first hour from a full tank. For this model that rating is 51 gallons, and the rated volume is 35 gallons. The 3,531 kWh figure applies to a household whose daily use matches the medium pattern. A household that draws more or less hot water than the test assumes falls outside that condition. This data gives no annual energy use for such a household. If the unit you are checking serves a different load, the selector by fuel, space and size filters other models. To find models in the same class, look up this model number with find a same-class replacement.
This text does not state the running cost. The cost depends on your own utility's electricity tariff. The page multiplies the 3,531 kWh figure by the rate for your ZIP in the cost calculator for your own ZIP. This model's energy use is 0 kWh from the class median of 3,531 kWh. On the same rate and at the medium draw pattern, its computed running cost therefore equals that of a model at the class median. A change in tariff changes the cost but not the 3,531 kWh figure. That figure depends only on the UEF of 0.92 and the test draw. The installed price is shown in its own block with its source and date. It is a modeled installed-cost range, not a quote, so this text does not repeat it.
DOE CCD · 2026-09-19