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A. O. Smith GDV-50 3**

A. O. Smith GDV-50 3** is in the DOE listing as of Oct 26, 2026.

It has a labeled size of 50 gallons, a certified storage volume of 48 gallons, a certified UEF of 0.66, and a certified first-hour rating of 77 gallons of hot water.

Its advertised UEF of 0.66 from A. O. Smith matches the certified 0.66 (Read Oct 5, 2026).

  • Gas storage water heater
  • 6 listed models

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

Storage volume
48gallons
UEF
0.66Uniform energy factor
First-hour rating
77gallonsHot water in the first hour
See it among every gas storage model

Advertised and certified figures

A. O. Smith GDV-50 3**: advertised and certified
A. O. Smith GDV-50 3**: advertised and certified Size: advertised 50 gal, certified 48 gal (advertised nominal size, certified storage volume). Size: advertised 48 gal, certified 48 gal (certified storage volume). UEF: advertised 0.66, certified 0.66. UEF: advertised 0.66, certified 0.66 (advertised up to). Size · advertised nominal size, certified storage volume Advertised 50 gal Certified 48 gal Size · certified storage volume Advertised 48 gal Certified 48 gal UEF Advertised 0.66 Certified 0.66 UEF · advertised up to Advertised 0.66 Certified 0.66
FigureAdvertisedCertifiedAdvertiserRead
Size 50 gal, nominal size 48 gal storage volume A. O. Smith Read Oct 5, 2026
Size 48 gal 48 gal storage volume A. O. Smith Read Oct 5, 2026
UEF 0.66 0.66 A. O. Smith Read Oct 5, 2026
UEF up to 0.66 0.66 A. O. Smith Read Oct 5, 2026
First-hour rating 77 gal 77 gal A. O. Smith Read Oct 5, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
G6-DVT5040NV 3**480.667779%High
G6-DVT5040NVL 3**480.667779%High
GDV-50 3**480.667779%High
GDV-50 3*1480.667779%High
GDV-50L 3**480.667779%High
GDV-50L 3*1480.667779%High

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

It holds 48 gallons in the test, 2 gallons less than its 50-gallon sold size. It delivers 77 gallons of hot water in the test's first hour. That is 29 gallons more than its tank holds, since it reheats during the hour. Among 763 gas storage models, 418 have a higher first-hour rating. The median gas storage model gives 78 gallons in the first hour of the test.

On Oct 26, 2026, this heater was not listed as ENERGY STAR certified. In tests, 66% of the energy went to hot water, so its UEF is 0.66. In the test, daily hot water use was set to high (its draw pattern). Of 434 gas storage models with the same draw pattern, 213 have a higher UEF and 209 a lower one. For its type and draw pattern, its UEF sits at the median. When it reheats water in the test, 79% of the energy it uses ends up in the water.

It is sold under 6 model numbers in all. All of its test figures are shared by 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.