Hot Water List

State ENLB-30 1**

State ENLB-30 1** is in the DOE listing as of Oct 19, 2026.

  • Electric storage water heater
  • 2 listed models

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

Its figures are also listed under A. O. Smith ENLB-30 1**.

Certified figures

Storage volume
26gallons
UEF
0.89Uniform energy factor
First-hour rating
43gallonsHot water in the first hour

Advertised and certified figures

State ENLB-30 1**: advertised and certified
State ENLB-30 1**: advertised and certified Size: advertised 28 gal, certified 26 gal (advertised nominal size, certified storage volume). Size: advertised 26 gal, certified 26 gal (certified storage volume). UEF: advertised 0.89, certified 0.89. First-hour rating: advertised 44 gal, certified 43 gal. Size · advertised nominal size, certified storage volume Advertised 28 gal Certified 26 gal Size · certified storage volume Advertised 26 gal Certified 26 gal UEF Advertised 0.89 Certified 0.89 First-hour rating Advertised 44 gal Certified 43 gal
State ENLB-30 1**: advertised figures, where and when read
FigureAdvertisedCertifiedAdvertiserRead
Size 28 gal, nominal size 26 gal storage volume State Read Oct 4, 2026
Size 26 gal 26 gal storage volume State Read Oct 4, 2026
UEF 0.89 0.89 State Read Oct 4, 2026
First-hour rating 44 gal 43 gal State Read Oct 4, 2026
First-hour rating 43 gal 43 gal State Read Oct 4, 2026

Certified figures by listed model

State ENLB-30 1**: certified figures by listed model
Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
EN6-30-DOLBS 1**260.894398%Low
ESX-30-DOLBS 1**260.894398%Low

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

It holds 26 gallons in the test, 2 gallons less than its 28-gallon sold size. Over one hour from a full tank, it gave 43 gallons in the test (its first-hour rating). Reheating lets it give 17 gallons beyond the 26 gallons in its tank. In the first hour, 405 of the 477 electric storage models give more hot water. The median electric storage model gives 55 gallons in the first hour of the test.

In tests, 89% of the energy it uses ends up as hot water (UEF 0.89). Its test simulated a day of low hot water use (its draw pattern). Its UEF is lower than that of 136 of the 157 electric storage models with its draw pattern. On its draw pattern, the median electric storage UEF is 0.92. When it reheats water in the test, 98% of the energy it uses ends up in the water.

It is the basic model for EN6-30-DOLBS 1** and ESX-30-DOLBS 1**. There are 3 more basic models with the same test figures. Of those, one or more are under the A. O. Smith, American, and RELIANCE WATER HEATERS brands. You can find the whole group on the page for the A. O. Smith ENLB-30 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.