ARISTON ENS30LU-*
0.93 UEF DOE CCD · 2026-09-19Grade G: where this UEF sits among the 163 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
An electric tank, low draw pattern (a one- or two-person household).
Checking the ARISTON ENS30LU-*? This electric tank uses 2,413 kWh of electricity a year at the low draw pattern, the standard daily hot-water usage DOE tests against. That describes a one- or two-person household. It is 26 kWh below the class median of 2,439 kWh.
Energy use per year
2,413 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 2,439 kWh for the 163 models registered in the same heater type and draw pattern; it ranks 9 of 163, lowest energy first.
Solid line: this model (2,413 kWh). Dashed line: the class median.
Min 724 kWh Median 2,439 kWh Max 2,550 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 low draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- Low 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
- 40 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 27 gal DOE CCD · 2026-09-19
What it costs to install
$1,467–$1,793 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 ARISTON model on file
What this brand files, by heater type.
UEF 0.93 · Grade G Price it on your ZIP
The annual figure is not read from the registry directly. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used, which is 0.93 for this model, and from the DOE test's daily hot-water draw for the low draw pattern. The result is 2,413 kWh of electricity a year, from DOE CCD data retrieved 2026-09-19. The class is the 163 models registered as an electric tank at the low draw pattern. Against a class median of 2,439 kWh, this model sits 26 kWh lower. Its rank is 9th lowest energy use of 163, which places it in the lowest quarter of its class. How the annual cost is calculated is documented separately.
The figure applies only to the low draw pattern. This model has a rated volume of 27 gallons and a first hour rating, the gallons of hot water available in the first hour from a full tank, of 40 gallons. A household whose daily hot-water use differs from the federal test's daily draw will not match 2,413 kWh. This page has no figure for this model at other draw patterns, so that value is not available. To compare fuel, space and size across water heaters, use the water heater selector.
Running cost is not written in the text because it depends on your own electricity tariff. The cost calculator applies the rate for your ZIP to 2,413 kWh, the figure for the low draw pattern. The 26 kWh gap to the 2,439 kWh median is an energy difference only. What that gap costs or saves depends on the same rate. The modeled installed-cost range appears in its own block with its source and date, as a range and not a quote. If you are matching an existing unit, you can find a same-class replacement by model number.
DOE CCD · 2026-09-19