A. O. SMITH ENL-30 1**
0.9 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 A. O. SMITH ENL-30 1**? This electric tank uses 2,494 kWh a year at the low draw pattern, the standard daily hot-water usage DOE tests against for a one- or two-person household. That is 55 kWh above the class median of 2,439 kWh across 163 models.
Energy use per year
2,494 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 2,439 kWh for the 163 models registered in the same heater type and draw pattern; it ranks 122 of 163, lowest energy first.
Solid line: this model (2,494 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
- 0.9 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
- 26 gal DOE CCD · 2026-09-19
What it costs to install
Not published: Installed cost range
This model's UEF lies outside the range NLR REMDB's cost model was fitted on, and the range is not stretched past it.
The annual energy figure on this page does not depend on this range and is unaffected.
Safety 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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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 A. O. SMITH model on file
What this brand files, by heater type.
UEF 0.9 · Grade G Price it on your ZIP
The registry lists a UEF, the ratio of hot water delivered to energy used, of 0.9 for this model. The annual figure of 2,494 kWh is a calculation by this site, not a registry value. It combines that UEF with the DOE test's daily hot-water draw for the low draw pattern. The source is DOE CCD, retrieved 2026-09-19. Among the 163 models registered as an electric tank at the low draw pattern, this unit ranks 122nd lowest for energy use. That places it in the second-highest quarter of its class, 55 kWh above the median of 2,439 kWh. The calculation method shows how the annual cost is derived from this figure.
The 2,494 kWh figure holds only under one condition: the low draw pattern, which describes a one- or two-person household. The model has a first hour rating, the gallons of hot water available in the first hour from a full tank, of 44 gallons. Its rated volume is 26 gallons. A household with heavier daily hot-water use falls outside the condition the figure was computed for, and no energy value for another draw pattern is available on this page. To compare by fuel, space and size, use the water heater selector. To look for units in the same class as this one, the replacement finder works from a model number.
The running cost is not stated in the text because it depends on your own utility electricity tariff. Multiplying 2,494 kWh by your rate gives the yearly electricity cost of this model at the low draw pattern. The gap of 55 kWh to the class median of 2,439 kWh is priced at that same rate. The cost calculator does this arithmetic from your ZIP. An installed price range is not published for this model. Its ratings lie outside the range the cost database's model was fitted on, and the range is not stretched past it.
DOE CCD · 2026-09-19