ARISTON ENS30L-*
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).
If you are checking this water heater, the ARISTON ENS30L-* uses 2,413 kWh a year. That figure is for the low draw pattern, the standard daily hot-water usage DOE tests against, for 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
- 44 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 registry lists a UEF, the ratio of hot water delivered to energy used, of 0.93 for this electric tank. This site computed the annual figure of 2,413 kWh; the registry does not list it. The calculation combines the UEF with the daily hot-water draw of the DOE test for the low draw pattern. The method is set out in how the annual cost is calculated. The source is DOE CCD, retrieved 2026-09-19. The figure applies only at that draw. A household that uses more or less hot water than the test assumes will use a different amount of electricity. This page gives no value for other draws, because none is available.
Among the 163 models registered as an electric tank at the low draw pattern, this model has the 9th lowest energy use. That places it in the lowest quarter of its class. Its 2,413 kWh is 26 kWh below the class median of 2,439 kWh. The rank counts models from lowest to highest annual energy use. Models ranked ahead of it use less energy at the same draw pattern. Models registered at other draw patterns are not part of the ranking. To see other models in the same class, use the same-class replacement search.
The first hour rating, the gallons of hot water available in the first hour from a full tank, is 44 gallons. The rated volume is 27 gallons. The figure of 2,413 kWh applies to the low draw pattern, a one- or two-person household. A household with more people falls outside that draw pattern, and this model's energy use at a higher draw is not available. The running cost is not stated here. It depends on your own electricity rate, so the cost calculator for your ZIP computes it. For a choice by fuel, space and size, see the water heater selector.
DOE CCD · 2026-09-19