LOCHINVAR ENS-50 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 LOCHINVAR ENS-50 1** against the registry, it uses 3,531 kWh of electricity a year. That figure applies to the medium draw pattern, the standard daily hot-water usage DOE tests against. It sits 0 kWh from the 3,531 kWh median of electric tank models tested at that 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
- 57 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 46 gal DOE CCD · 2026-09-19
What it costs to install
$1,736–$2,053 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 LOCHINVAR model on file
What this brand files, by heater type.
UEF 0.92 · Grade G Price it on your ZIP
The registry does not list the 3,531 kWh figure. This site calculated it from the registry's UEF, the ratio of hot water delivered to energy used, which is 0.92 for this model. The calculation also uses the DOE test's daily hot-water draw for the medium pattern, which represents a typical household on a busy morning. Both inputs come from the DOE Compliance Certification Database, retrieved 2026-09-19. The figure covers electricity only, because this unit is an electric tank. A household that uses more or less hot water than the test day will use a different amount of energy than 3,531 kWh. The page on how this site calculates annual energy and cost explains each step behind the figure.
The comparison group is the 426 models registered as an electric tank at the medium draw pattern. Among them, this unit ranks 213th for lowest energy use. Its 3,531 kWh equals 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 57 gallons. Its rated volume is 46 gallons. The rating describes a household whose busiest hour stays within 57 gallons. A household that needs more than that in one hour falls outside it. A reader looking for energy use below 3,531 kWh needs a different model in the same class. The same-class replacement search by model number finds those models.
This text does not state a running cost for the ENS-50 1**. The cost depends on the reader's own utility electricity tariff, applied to the 3,531 kWh test-day figure. The page calculates it from the reader's ZIP. The running-cost calculator for your own ZIP does the same calculation for other homes. That cost only holds for a household that uses hot water at the medium draw pattern. Heavier or lighter use changes it. The installed price range has its own block, with its source and date. It is a modeled installed-cost range, not a quote, and this text does not repeat it. The registry data does not show how this model performs in a particular home outside the test conditions.
DOE CCD · 2026-09-19