AMERICAN ENS-40W 1**
0.88 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 AMERICAN ENS-40W 1** against the registry, it uses 2,550 kWh of electricity a year at the federal test's low daily hot-water draw. That is 111 kWh above its class median of 2,439 kWh. This site computes the figure; the registry does not list it.
Energy use per year
2,550 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 158 of 163, lowest energy first.
Solid line: this model (2,550 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
- 0.88 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
- 41 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 37 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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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 40-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 AMERICAN model on file
What this brand files, by heater type.
UEF 0.88 · Grade G Price it on your ZIP
The registry lists a UEF, the ratio of hot water delivered to energy used, of 0.88 for this electric tank. This site combines that value with the daily hot-water draw of the low draw pattern, the standard daily hot-water usage DOE tests against, to reach 2,550 kWh of electricity a year. The source is DOE CCD, retrieved 2026-09-19. The figure applies only to the low draw pattern. A household that uses more or less hot water than the test assumes will use a different amount, and this page has no figure for other usage. The steps behind the calculation are described in how the annual cost is calculated.
This model is compared with the 163 models registered as an electric tank at the low draw pattern. It ranks 158th lowest energy use of 163, and it sits 111 kWh above the class median of 2,439 kWh. That places it in the highest quarter of its class for energy use. The first hour rating, the gallons of hot water available in the first hour from a full tank, is 41 gallons, and the rated volume is 37 gallons. Those two ratings describe capacity, and the data used here does not explain the gap from the median. If you need a unit in the same class for comparison, you can find a same-class replacement by model number.
The running cost is not written in this text because it depends on your own utility electricity tariff. The same 2,550 kWh costs a different amount in each service area, and the 111 kWh above the class median is charged at that same rate. To apply your rate to this model, use the cost calculator on your own ZIP. The 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. Any installed price for this unit is therefore unknown here.
DOE CCD · 2026-09-19