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GE GE40L**DAT01

GE GE40L**DAT01 is in the DOE listing as of Oct 26, 2026.

It has a labeled size of 40 gallons, a certified storage volume of 36 gallons, a certified UEF of 0.93, and a certified first-hour rating of 56 gallons of hot water.

Its advertised UEF of 0.92 from GE differs from the certified 0.93 (Read Oct 5, 2026).

  • Electric storage water heater
  • 1 listed model

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

Storage volume
36gallons
UEF
0.93Uniform energy factor
First-hour rating
56gallonsHot water in the first hour
See it among every electric storage model

Advertised and certified figures

GE GE40L**DAT01: advertised and certified
GE GE40L**DAT01: 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 0.93. First-hour rating: advertised 56 gal, certified 56 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 0.93 First-hour rating Advertised 56 gal Certified 56 gal
FigureAdvertisedCertifiedAdvertiserRead
Size 40 gal, nominal size 36 gal storage volume GE Read Oct 5, 2026
Size 36 gal 36 gal storage volume GE Read Oct 5, 2026
UEF 0.92 0.93 GE Read Oct 5, 2026
First-hour rating 56 gal 56 gal GE Read Oct 5, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
GE40L**DAT01360.935698%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. Over one hour from a full tank, it gave 56 gallons in the test (its first-hour rating). That is 20 gallons more than its tank holds, since it reheats during the hour. In the first hour, 197 of the 477 electric storage models give more hot water. Among electric storage models, the median first-hour rating is 55 gallons.

In the test, 7% of its energy does not reach the hot water (UEF 0.93). The daily hot water use in the test, called its draw pattern, was medium. Of 297 electric storage models with the same draw pattern, 20 have a higher UEF and 216 a lower one. For its type and draw pattern, the UEF runs from 0.91 to 0.95. Of the energy spent to reheat water, 98% goes into it (its recovery efficiency).

Updated Oct 26, 2026 · Methodology

Not covered

  • Changes to an advertised figure after the date beside it.