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A. O. Smith GDVNT-50L 1**

A. O. Smith GDVNT-50L 1** 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 0.65, and a certified first-hour rating of 84 gallons of hot water.

Its advertised UEF of 0.65 from A. O. Smith matches the certified 0.65 (Read Oct 5, 2026).

  • Gas storage water heater
  • 2 listed models

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

Storage volume
48gallons
UEF
0.65Uniform energy factor
First-hour rating
84gallonsHot water in the first hour
See it among every gas storage model

Advertised and certified figures

A. O. Smith GDVNT-50L 1**: advertised and certified
A. O. Smith GDVNT-50L 1**: 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 0.65, certified 0.65. UEF: advertised 0.65, certified 0.65 (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 0.65 Certified 0.65 UEF · advertised up to Advertised 0.65 Certified 0.65
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 0.65 0.65 A. O. Smith Read Oct 5, 2026
UEF up to 0.65 0.65 A. O. Smith Read Oct 5, 2026
First-hour rating 84 gal 84 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-UDT5038NV 1**480.658481%High
GDVNT-50L 1**480.658481%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 84 gallons of hot water in the test's first hour. Reheating lets it give 36 gallons beyond the 48 gallons in its tank. Among 763 gas storage models, 209 have a higher first-hour rating. The median gas storage model gives 78 gallons in its first hour.

On Oct 26, 2026, this heater was not listed as ENERGY STAR certified. In the test, 35% of its energy does not reach the hot water (UEF 0.65). Its test simulated a day of high hot water use (its draw pattern). Its UEF is lower than that of 225 of the 434 gas storage models with its draw pattern. On its draw pattern, the median gas storage UEF is 0.66. When it reheats water in the test, 81% of the energy it uses ends up in the water.

It is the basic model for G6-UDT5038NV 1** and GDVNT-50L 1**. Its test figures match those of 3 other basic models. Of those, one or more are under the American, RELIANCE WATER HEATERS, and State brands.

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.