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U.S. Craftmaster ENT-40 1**

U.S. Craftmaster ENT-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 ENT-40 1**.

Storage volume
36gallons
UEF
0.92Uniform energy factor
First-hour rating
53gallonsHot water in the first hour
See it among every electric storage model

Advertised and certified figures

U.S. Craftmaster ENT-40 1**: advertised and certified
U.S. Craftmaster ENT-40 1**: advertised and certified Size: advertised 40 gal, certified 36 gal (advertised nominal size, certified storage volume). Size: advertised 36 gal, certified 36 gal (certified storage volume). UEF: advertised 0.92, certified 0.92. First-hour rating: advertised 53 gal, certified 53 gal. Size · advertised nominal size, certified storage volume Advertised 40 gal Certified 36 gal Size · certified storage volume Advertised 36 gal Certified 36 gal UEF Advertised 0.92 Certified 0.92 First-hour rating Advertised 53 gal Certified 53 gal
FigureAdvertisedCertifiedAdvertiserRead
Size 40 gal, nominal size 36 gal storage volume U.S. Craftmaster Read Oct 5, 2026
Size 36 gal 36 gal storage volume U.S. Craftmaster Read Oct 5, 2026
UEF 0.92 0.92 U.S. Craftmaster Read Oct 5, 2026
First-hour rating 53 gal 53 gal U.S. Craftmaster Read Oct 5, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
NE3F40HD 1**360.925398%Medium
NE3F40HS 1**360.925398%Medium

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

It holds 36 gallons in the test, 4 gallons less than its 40-gallon sold size. It delivers 53 gallons of hot water in the test's first hour. That is 17 gallons more than its tank holds, since it reheats during the hour. In the first hour, 265 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, 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. On its draw pattern, its UEF is also the median electric storage UEF. Of the energy spent to reheat water, 98% goes into it (its recovery efficiency).

Its 2 model numbers are NE3F40HD 1** and NE3F40HS 1**. Its test figures match those of 7 other basic models. Each of them is listed under a different brand. You can find the whole group on the page for the A. O. Smith ENT-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.