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State PETX-55 1**

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

  • Electric storage water heater
  • 1 listed model

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

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

Storage volume
55gallons
UEF
0.94Uniform energy factor
First-hour rating
76gallonsHot water in the first hour
See it among every electric storage model

Advertised and certified figures

State PETX-55 1**: advertised and certified
State PETX-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 0.94, certified 0.94. First-hour rating: advertised 76 gal, certified 76 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 0.94 Certified 0.94 First-hour rating Advertised 76 gal Certified 76 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 0.94 0.94 State Read Oct 5, 2026
First-hour rating 76 gal 76 gal State Read Oct 5, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
EEX-55-DXRT 1**550.947698%High

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. Over one hour from a full tank, it gave 76 gallons in the test (its first-hour rating). Reheating lets it give 21 gallons beyond the 55 gallons in its tank. Among 477 electric storage models, 8 have a higher first-hour rating. Among electric storage models, the median first-hour rating is 55 gallons.

In the test, 6% of its energy does not reach the hot water (UEF 0.94). Its test simulated a day of high hot water use (its draw pattern). Among 23 electric storage models with its draw pattern, none reaches a higher UEF than this one. Its UEF is the median for its type and draw pattern. Of the energy spent to reheat water, 98% goes into it (its recovery efficiency).

There are 3 more basic models with the same test figures. Those basic models are sold with A. O. Smith, American, and RELIANCE WATER HEATERS as their brand names. You can find the whole group on the page for the A. O. Smith PETX-55 1**.

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.