STATE 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 verifying this water heater's figure, the STATE ENS-40W 1**, an electric tank, uses 2,550 kWh a year at the low draw pattern. Draw pattern means the standard daily hot-water usage DOE tests against, here a one- or two-person household. That is 111 kWh above the class median of 2,439 kWh across 163 models.
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
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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 STATE model on file
What this brand files, by heater type.
UEF 0.88 · Grade G Price it on your ZIP
The figure of 2,550 kWh is computed by this site, not by the registry. The registry lists a UEF, the ratio of hot water delivered to energy used, of 0.88. This site combines it with the DOE test's daily hot-water draw for the low draw pattern. The condition is the federal test's draw, so a real household will differ. The source is the DOE CCD, retrieved 2026-09-19. Among the 163 electric tank models registered at the low draw pattern, this unit ranks 158th lowest energy use. 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 figure applies to a one- or two-person household, which is the low draw pattern. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 41 gallons. The rated volume is 37 gallons. These ratings match the draw pattern the figure was computed for. The unit suits a reader who needs a small electric tank and accepts 2,550 kWh a year at that draw. It suits less well a reader who wants lower energy use, since 158th lowest of 163 is in the highest quarter. A larger household draws more hot water than the test assumes, so this figure would not hold. To compare by fuel, space and size, use the water heater selector. To find a same-class alternative, try the replacement search by model number.
Running cost depends on your own electricity rate, so no cost amount is written here. Multiply 2,550 kWh by your rate per kilowatt-hour to get a yearly figure. The cost calculator does this from your ZIP. The steps are described under how the annual cost is calculated. The installed price range is not published for this model. Its ratings lie outside the range the cost database's model was fitted on. The range is not stretched past that limit. Compared with a median unit at 2,439 kWh, the yearly cost gap is 111 kWh multiplied by your rate.
DOE CCD · 2026-09-19