AMERICAN STANDARD WATER HEATERS ENS50LU-*
0.93 UEF DOE CCD · 2026-09-19Grade G: where this UEF sits among the 426 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
An electric tank, medium draw pattern (a typical three- or four-person household, about 55 gallons on a busy morning).
If you are checking the AMERICAN STANDARD WATER HEATERS ENS50LU-* against the registry, this is its energy figure. It uses 3,493 kWh of electricity a year at the medium draw pattern, the standard daily hot-water usage DOE tests against. That is 38 kWh below the 3,531 kWh median for electric tank models tested at the same draw pattern.
Energy use per year
3,493 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 3,531 kWh for the 426 models registered in the same heater type and draw pattern; it ranks 153 of 426, lowest energy first.
Solid line: this model (3,493 kWh). Dashed line: the class median.
Min 773 kWh Median 3,531 kWh Max 3,569 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 medium draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- Medium 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
- 52 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 42 gal DOE CCD · 2026-09-19
What it costs to install
$1,684–$2,169 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 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 STANDARD WATER HEATERS model on file
What this brand files, by heater type.
UEF 0.93 · Grade G Price it on your ZIP
The 3,493 kWh figure is computed by this site. The registry does not publish it. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for the medium pattern. This model's UEF is 0.93, from the DOE CCD, retrieved 2026-09-19. The figure applies only at that test draw. It is not a measurement taken in any particular home. The registry also lists a rated volume of 42 gallons. It gives a first hour rating, the gallons of hot water available in the first hour from a full tank, of 52 gallons. Our page on how the annual energy and cost figures are calculated sets out each step from registry value to yearly total.
In its class, the ENS50LU-* ranks 153rd lowest in energy use among the 426 models registered as an electric tank at the medium draw pattern. The class median is 3,531 kWh a year, and this model sits 38 kWh below it. Both figures come from the same test draw, so the comparison holds at that condition. The medium pattern stands for a typical household on a busy morning. The rank applies to homes that match that pattern. Models tested at a different draw pattern belong to a different class, so this rank says nothing about them. To compare other fuels or sizes, use the water heater selector by fuel, space and size. The same-class replacement search by model number lists other models in this group.
The running cost is not stated in this text. It depends on your own utility's electricity tariff, which this page cannot know in advance. The page computes it from your ZIP, based on the 3,493 kWh figure at the medium draw pattern. A different tariff changes the cost, but the energy figure stays at 3,493 kWh. The 38 kWh gap to the class median also stays the same in energy terms; its cost likewise depends on your tariff. To run that calculation, open the running cost calculator for your ZIP. The installed price range appears in its own block on this page, with its source and date. It is a modeled range, not a quote.
DOE CCD · 2026-09-19