ARISTON AURES SM 3 CB 110V US*
0.94 UEF DOE CCD · 2026-09-19Grade F: where this UEF sits among the 271 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
An electric tankless unit, very small draw pattern (small units - a single bathroom, or a point-of-use heater under a sink).
For anyone verifying this unit, ARISTON AURES SM 3 CB 110V US* uses 628 kWh of electricity a year. That figure is for the very small draw pattern, the standard daily hot-water usage DOE tests against. It is 13 kWh above the class median of 615 kWh.
Energy use per year
628 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 above the median of 615 kWh for the 271 models registered in the same heater type and draw pattern; it ranks 188 of 271, lowest energy first.
Solid line: this model (628 kWh). Dashed line: the class median.
Min 562 kWh Median 615 kWh Max 649 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
- 0.94 DOE CCD · 2026-09-19 Compared only with other models registered as an electric tankless unit at the very small draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- Very small DOE CCD · 2026-09-19
- Maximum Gallons Per Minute how many gallons a minute it can heat while running continuously
- 0.4 gal/min DOE CCD · 2026-09-19
What it costs to install
$1,300–$1,790 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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How to size a tankless water heater by GPM
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 tankless water heaters
Electric instantaneous units, sized by flow rate rather than tank gallons.
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Every ARISTON model on file
What this brand files, by heater type.
UEF 0.94 · Grade F Price it on your ZIP
The registry lists a UEF, the ratio of hot water delivered to energy used, of 0.94 for this model. This site, not the registry, computed the 628 kWh figure. It used that UEF and the DOE test's daily hot-water draw for the very small draw pattern. The source is DOE CCD, retrieved 2026-09-19. The figure holds only at that test draw. Real use in a home can differ, and this page does not estimate that difference. Treat the number as a comparison value under fixed test conditions.
Among the 271 electric tankless models at the very small draw pattern, this unit ranks 188th lowest in energy use. The class median is 615 kWh. This model sits 13 kWh above that median. That places it in the second-highest quarter of its class for energy use. The comparison covers only the same fuel, heater type and draw pattern. It says nothing about other draw patterns. A model ranked lower on this list uses less electricity at the same test draw. To look at other units in the same class, you can find a same-class replacement by model number.
The very small draw pattern describes small units: a single bathroom, or a point-of-use heater under a sink. The registry lists a maximum flow rate in gallons per minute of 0.4 for this model. Someone sizing a heater for a whole house should not use the 628 kWh figure, because it applies only to that small draw. Running cost depends on your own electricity rate, so this page states no cost in the text. Enter your ZIP in the cost calculator for your own ZIP to apply your tariff to 628 kWh. The steps are set out in how the annual cost is calculated.
DOE CCD · 2026-09-19