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RELIANCE WATER HEATERS ENL-50 1**

RELIANCE WATER HEATERS ENL-50 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 ENL-50 1**.

Storage volume
48gallons
UEF
0.92Uniform energy factor
First-hour rating
51gallonsHot water in the first hour
See it among every electric storage model

Advertised and certified figures

RELIANCE WATER HEATERS ENL-50 1**: advertised and certified
RELIANCE WATER HEATERS ENL-50 1**: advertised and certified Size: advertised 51 gal, certified 48 gal (advertised nominal size, certified storage volume). Size: advertised 48 gal, certified 48 gal (certified storage volume). UEF: advertised 0.92, certified 0.92. First-hour rating: advertised 51 gal, certified 51 gal. Size · advertised nominal size, certified storage volume Advertised 51 gal Certified 48 gal Size · certified storage volume Advertised 48 gal Certified 48 gal UEF Advertised 0.92 Certified 0.92 First-hour rating Advertised 51 gal Certified 51 gal
FigureAdvertisedCertifiedAdvertiserRead
Size 51 gal, nominal size 48 gal storage volume RELIANCE WATER HEATERS Read Oct 4, 2026
Size 48 gal 48 gal storage volume RELIANCE WATER HEATERS Read Oct 4, 2026
UEF 0.92 0.92 RELIANCE WATER HEATERS Read Oct 4, 2026
First-hour rating 51 gal 51 gal RELIANCE WATER HEATERS Read Oct 4, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
6-50-EOLS 1**480.925198%Medium

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

It holds 48 gallons in the test, 3 gallons less than its 51-gallon sold size. Starting full, it gives 51 gallons of hot water in its first hour of use. Reheating lets it give 3 gallons beyond the 48 gallons in its tank. In the first hour, 286 of the 477 electric storage models give more hot water. Among electric storage models, the median first-hour rating is 55 gallons.

In tests, 92% of the energy it uses ends up as hot water (UEF 0.92). In the test, daily hot water use was set to medium (its draw pattern). Of 297 electric storage models with the same draw pattern, 81 have a higher UEF. For its type and draw pattern, its UEF sits at the median. Of the energy spent to reheat water, 98% goes into it (its recovery efficiency).

There are 5 more basic models with the same test figures. They are listed under 5 other brands, one each. For the full group, see the A. O. Smith ENL-50 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.