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Lochinvar ENL-40 1**

Lochinvar ENL-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 ENL-40 1**.

Storage volume
35gallons
UEF
0.89Uniform energy factor
First-hour rating
50gallonsHot water in the first hour
See it among every electric storage model

Advertised and certified figures

Lochinvar ENL-40 1**: advertised and certified
Lochinvar ENL-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 0.89, certified 0.89. First-hour rating: advertised 50 gal, certified 50 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 0.89 Certified 0.89 First-hour rating Advertised 50 gal Certified 50 gal
FigureAdvertisedCertifiedAdvertiserRead
Size 38 gal, nominal size 35 gal storage volume Lochinvar Read Oct 4, 2026
Size 35 gal 35 gal storage volume Lochinvar Read Oct 4, 2026
UEF 0.89 0.89 Lochinvar Read Oct 4, 2026
First-hour rating 50 gal 50 gal Lochinvar Read Oct 4, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
LES-40 1**350.895098%Low

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. Starting full, it gives 50 gallons of hot water in its first hour of use. Reheating lets it give 15 gallons beyond the 35 gallons in its tank. Of 477 electric storage models, 321 give more hot water in the first hour. The median electric storage model gives 55 gallons in its first hour.

In tests, 89% of the energy went to hot water, so its UEF is 0.89. Its test simulated a day of low hot water use (its draw pattern). Among 157 electric storage models on its draw pattern, 136 have a higher UEF. For its type and draw pattern, the UEF runs from 0.88 to 0.95. The water took in 98% of the energy used to reheat it (its recovery efficiency).

There are 5 more basic models with the same test figures. Each of the 5 other brands lists one of them. For the full group, see the A. O. Smith ENL-40 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.