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A. O. Smith FMDV-50 2**

A. O. Smith FMDV-50 2** is in the DOE listing as of Oct 26, 2026.

It has a labeled size of 50 gallons, a certified storage volume of 47 gallons, a certified UEF of 0.57, and a certified first-hour rating of 67 gallons of hot water.

Its advertised UEF of 0.57 from A. O. Smith matches the certified 0.57 (Read Oct 4, 2026).

  • Gas storage water heater
  • 1 listed model

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

Storage volume
47gallons
UEF
0.57Uniform energy factor
First-hour rating
67gallonsHot water in the first hour
See it among every gas storage model

Advertised and certified figures

A. O. Smith FMDV-50 2**: advertised and certified
A. O. Smith FMDV-50 2**: advertised and certified Size: advertised 50 gal, certified 47 gal (advertised nominal size, certified storage volume). Size: advertised 47 gal, certified 47 gal (certified storage volume). UEF: advertised 0.57, certified 0.57. First-hour rating: advertised 67 gal, certified 67 gal. Size · advertised nominal size, certified storage volume Advertised 50 gal Certified 47 gal Size · certified storage volume Advertised 47 gal Certified 47 gal UEF Advertised 0.57 Certified 0.57 First-hour rating Advertised 67 gal Certified 67 gal
FigureAdvertisedCertifiedAdvertiserRead
Size 50 gal, nominal size 47 gal storage volume A. O. Smith Read Oct 4, 2026
Size 47 gal 47 gal storage volume A. O. Smith Read Oct 4, 2026
UEF 0.57 0.57 A. O. Smith Read Oct 4, 2026
First-hour rating 67 gal 67 gal A. O. Smith Read Oct 4, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
FMDV-50 2**470.576777%Medium

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

It holds 47 gallons in the test, 3 gallons less than its 50-gallon sold size. Starting full, it gives 67 gallons of hot water in its first hour of use. Reheating lets it give 20 gallons beyond the 47 gallons in its tank. Among 763 gas storage models, 552 have a higher first-hour rating. The median gas storage model gives 78 gallons in the first hour of the test.

It was not listed as ENERGY STAR certified on Oct 26, 2026. In the test, 43% of its energy does not reach the hot water (UEF 0.57). Its test ran at the medium level of daily hot water use. Among 288 gas storage models on its draw pattern, 277 have a higher UEF. A UEF of 0.60 is the median for its type and draw pattern. Of the energy spent to reheat water, 77% goes into it (its recovery efficiency).

Its test figures match those of 4 other basic models. Each of them is listed under a different brand.

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.