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RELIANCE WATER HEATERS ENJB-40 1**

RELIANCE WATER HEATERS ENJB-40 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 ENJB-40 1**.

Storage volume
35gallons
UEF
0.94Uniform energy factor
First-hour rating
57gallonsHot water in the first hour
See it among every electric storage model

Advertised and certified figures

RELIANCE WATER HEATERS ENJB-40 1**: advertised and certified
RELIANCE WATER HEATERS ENJB-40 1**: advertised and certified Size: advertised 38 gal, certified 35 gal (advertised nominal size, certified storage volume). Size: advertised 35 gal, certified 35 gal (certified storage volume). UEF: advertised 0.94, certified 0.94. First-hour rating: advertised 57 gal, certified 57 gal. Size · advertised nominal size, certified storage volume Advertised 38 gal Certified 35 gal Size · certified storage volume Advertised 35 gal Certified 35 gal UEF Advertised 0.94 Certified 0.94 First-hour rating Advertised 57 gal Certified 57 gal
FigureAdvertisedCertifiedAdvertiserRead
Size 38 gal, nominal size 35 gal storage volume RELIANCE WATER HEATERS Read Oct 4, 2026
Size 35 gal 35 gal storage volume RELIANCE WATER HEATERS Read Oct 4, 2026
UEF 0.94 0.94 RELIANCE WATER HEATERS Read Oct 4, 2026
First-hour rating 57 gal 57 gal RELIANCE WATER HEATERS Read Oct 4, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
6-40-EOMBS-E 1**350.945798%Medium

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

It holds 35 gallons in the test, 3 gallons less than its 38-gallon sold size. It delivers 57 gallons of hot water in the test's first hour. That is 22 gallons more than its tank holds, since it reheats during the hour. Among 477 electric storage models, 177 have a higher first-hour rating. The median electric storage model gives 55 gallons in its first hour.

In tests, 94% of the energy it uses ends up as hot water (UEF 0.94). Its test simulated a day of medium hot water use (its draw pattern). Among 297 electric storage models on its draw pattern, 4 have a higher UEF. For its type and draw pattern, the UEF runs from 0.91 to 0.95. Of the energy spent to reheat water, 98% goes into it (its recovery efficiency).

All of its test figures are shared by 4 other basic models. Each of the 4 other brands lists one of them. For the full group, see the A. O. Smith ENJB-40 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.