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State ENT-55 1**

State ENT-55 1** is in the DOE listing as of Oct 19, 2026.

  • Electric storage water heater
  • 5 listed models

ENERGY STAR certification does not cover this type of water heater.

Its figures are also listed under A. O. Smith ENT-55 1**.

Storage volume
55gallons
UEF
0.93Uniform energy factor
First-hour rating
72gallonsHot water in the first hour
See it among every electric storage model

Advertised and certified figures

State ENT-55 1**: advertised and certified
State ENT-55 1**: advertised and certified Size: advertised 55 gal, certified 55 gal (advertised nominal size, certified storage volume). Size: advertised 55 gal, certified 55 gal (certified storage volume). UEF: advertised 0.93, certified 0.93. First-hour rating: advertised 72 gal, certified 72 gal. Size · advertised nominal size, certified storage volume Advertised 55 gal Certified 55 gal Size · certified storage volume Advertised 55 gal Certified 55 gal UEF Advertised 0.93 Certified 0.93 First-hour rating Advertised 72 gal Certified 72 gal
FigureAdvertisedCertifiedAdvertiserRead
Size 55 gal, nominal size 55 gal storage volume State Read Oct 5, 2026
Size 55 gal 55 gal storage volume State Read Oct 5, 2026
UEF 0.93 0.93 State Read Oct 5, 2026
First-hour rating 72 gal 72 gal State Read Oct 5, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
EN6-55-DORT 1**550.937298%Medium
EN8-55-DORT 1**550.937298%Medium
ESX-55-DONT 1**550.937298%Medium
FN6-55-DORT 1**550.937298%Medium
PCE-52-2ORTA 1**550.937298%Medium

UEF is the uniform energy factor. A dash means the model has no such figure.

Sold as 55 gallons, it holds 55 gallons in the test. It delivers 72 gallons of hot water in the test's first hour. Its tank holds 55 gallons, so reheating adds 17 gallons during the first hour. In the first hour, 37 of the 477 electric storage models give more hot water. Among electric storage models, the median first-hour rating is 55 gallons.

In tests, 93% of the energy it uses ends up as hot water (UEF 0.93). The daily hot water use in the test, called its draw pattern, was medium. Among 297 electric storage models on its draw pattern, 20 have a higher UEF. For its type and draw pattern, the UEF runs from 0.91 to 0.95. The water took in 98% of the energy used to reheat it (its recovery efficiency).

A tag or quote may show any of its 5 model numbers. Its test figures match those of 4 other basic models. They are listed under 4 other brands, one each. For the full group, see the A. O. Smith ENT-55 1** page.

Also listed as

They carry every figure in the table above.

Updated Oct 19, 2026 · Methodology

Not covered

  • Changes to an advertised figure after the date beside it.