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Lochinvar ENLB-40 1**

Lochinvar ENLB-40 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-40 1**.

Storage volume
35gallons
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

Lochinvar ENLB-40 1**: advertised and certified
Lochinvar ENLB-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 0.92, certified 0.92. First-hour rating: advertised 51 gal, certified 51 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 0.92 Certified 0.92 First-hour rating Advertised 51 gal Certified 51 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 0.92 0.92 Lochinvar Read Oct 4, 2026
First-hour rating 51 gal 51 gal Lochinvar Read Oct 4, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
LDS-40 1**350.925198%Medium
LES-40B 1**350.925198%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. Over one hour from a full tank, it gave 51 gallons in the test (its first-hour rating). Its tank holds 35 gallons, so reheating adds 16 gallons during the first hour. Among 477 electric storage models, 286 have a higher first-hour rating. The median electric storage model gives 55 gallons in its first hour.

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). Among 297 electric storage models on its draw pattern, 81 have a higher UEF. Its UEF is the median for its type and draw pattern. The water took in 98% of the energy used to reheat it (its recovery efficiency).

It is sold as LDS-40 1** and LES-40B 1**. All of its test figures are shared by 11 other basic models. In all, 8 other brands list one or more of them. For the full group, see the A. O. Smith ENLB-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.