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State HETF-40 1**

State HETF-40 1** is in the DOE listing as of Oct 19, 2026.

  • Electric storage water heater
  • 3 listed models

ENERGY STAR certification does not cover this type of water heater.

Its figures are also listed under A. O. Smith HETF-40 1**.

Storage volume
36gallons
UEF
0.93Uniform energy factor
First-hour rating
63gallonsHot water in the first hour
See it among every electric storage model

Advertised and certified figures

State HETF-40 1**: advertised and certified
State HETF-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 0.93, certified 0.93. First-hour rating: advertised 55 gal, certified 63 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 0.93 Certified 0.93 First-hour rating Advertised 55 gal Certified 63 gal
FigureAdvertisedCertifiedAdvertiserRead
Size 40 gal, nominal size 36 gal storage volume State Read Oct 5, 2026
Size 36 gal 36 gal storage volume State Read Oct 5, 2026
UEF 0.93 0.93 State Read Oct 5, 2026
First-hour rating 55 gal 63 gal State Read Oct 5, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
EE6-40-DURT 1**360.936398%Medium
EEA8-40-DFRT 1**360.936398%Medium
EEX-40-DURT 1**360.936398%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. Starting full, it gives 63 gallons of hot water in its first hour of use. Reheating lets it give 27 gallons beyond the 36 gallons in its tank. Of 477 electric storage models, 99 give more hot water in the first hour. The median electric storage model gives 55 gallons in the first hour of the test.

In tests, 93% of the energy went to hot water, so its UEF is 0.93. Its test simulated a day of medium hot water use (its draw pattern). Among 297 electric storage models on its draw pattern, 20 have a higher UEF. For its type and draw pattern, the median UEF is 0.92. The water took in 98% of the energy used to reheat it (its recovery efficiency).

It is sold as EE6-40-DURT 1**, EEA8-40-DFRT 1**, and EEX-40-DURT 1**. All of its test figures are shared by 4 other basic models. They are listed under 4 other brands, one each. For the full group, see the A. O. Smith HETF-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.