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American FMDV-40 2**

American FMDV-40 2** is in the DOE listing as of Oct 26, 2026.

  • Gas storage water heater
  • 1 listed model

Not listed as ENERGY STAR certified on Oct 26, 2026.

Its figures are also listed under A. O. Smith FMDV-40 2**.

Storage volume
38gallons
UEF
0.59Uniform energy factor
First-hour rating
57gallonsHot water in the first hour
See it among every gas storage model

Advertised and certified figures

American FMDV-40 2**: advertised and certified
American FMDV-40 2**: advertised and certified Size: advertised 40 gal, certified 38 gal (advertised nominal size, certified storage volume). Size: advertised 38 gal, certified 38 gal (certified storage volume). UEF: advertised 0.59, certified 0.59. First-hour rating: advertised 57 gal, certified 57 gal. Size · advertised nominal size, certified storage volume Advertised 40 gal Certified 38 gal Size · certified storage volume Advertised 38 gal Certified 38 gal UEF Advertised 0.59 Certified 0.59 First-hour rating Advertised 57 gal Certified 57 gal
FigureAdvertisedCertifiedAdvertiserRead
Size 40 gal, nominal size 38 gal storage volume American Read Oct 4, 2026
Size 38 gal 38 gal storage volume American Read Oct 4, 2026
UEF 0.59 0.59 American Read Oct 4, 2026
First-hour rating 57 gal 57 gal American Read Oct 4, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
MHDV-62-40T32 2**380.595776%Medium

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

It holds 38 gallons in the test, 2 gallons less than its 40-gallon sold size. It delivers 57 gallons of hot water in the test's first hour. Its tank holds 38 gallons, so reheating adds 19 gallons during the first hour. In the first hour, 717 of the 763 gas storage models give more hot water. Among gas storage models, the median first-hour rating is 78 gallons.

As of Oct 26, 2026, it was not listed as ENERGY STAR certified. In tests, 59% of the energy went to hot water, so its UEF is 0.59. Its test ran at the medium level of daily hot water use. Its UEF is lower than that of 185 of the 288 gas storage models with its draw pattern. On its draw pattern, the median gas storage UEF is 0.60. When it reheats water in the test, 76% of the energy it uses ends up in the water.

Its test figures match those of 4 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 FMDV-40 2**.

Also listed as

They carry every figure in the table above.

Updated Oct 26, 2026 · Methodology

Not covered

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