RELIANCE WATER HEATERS HESF-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).
If you are checking the RELIANCE WATER HEATERS HESF-40 1**, this electric tank uses 3,531 kWh of electricity a year. That figure applies at the medium draw pattern, the standard daily hot-water usage DOE tests against. It is 0 kWh from the median of 3,531 kWh for the 426 electric tanks registered at that 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
- 64 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 37 gal DOE CCD · 2026-09-19
What it costs to install
$1,605–$1,828 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 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 figure combines this model'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 pattern. This model's UEF is 0.92, taken from DOE's Compliance Certification Database on 2026-09-19. Because it rests on that fixed test draw, the figure describes the test condition rather than any particular home. Within its class, the model ranks 213th lowest energy use of 426. That rank places it in the second-lowest quarter of its class for energy use. Because it sits at the class median, this model is neither above nor below the middle of its class.
The medium draw pattern stands for a typical household with a busy morning of hot-water use. This tank has a rated volume of 37 gallons. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 64 gallons. The 3,531 kWh figure fits a home whose daily use matches the medium pattern. It does not describe a home whose daily draw differs from the test's, and this page has no energy figure for such a home. The rating also does not cover a household whose busiest hour needs more than 64 gallons. To compare other heaters, use the water heater selector by fuel, space and size. To check a registered alternative, find a same-class replacement by model number.
The text gives no running cost, because the cost of 3,531 kWh of electricity depends on your own utility tariff. The running cost calculator for your ZIP applies your local rate to this model's figure. The page on how the annual cost is calculated explains each input and its source. The installed price range sits in its own block with its source and date. That range is a modeled installed-cost range, not a quote. If you are checking a listing against the registry, match the model number HESF-40 1** exactly. The figures on this page apply only to that registered model number, so they do not cover other listings.
DOE CCD · 2026-09-19