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State GPDT-50 3**

State GPDT-50 3** is in the DOE listing as of Oct 26, 2026.

  • Gas storage water heater
  • 4 listed models

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

Its figures are also listed under A. O. Smith GPDT-50 3**.

Storage volume
48gallons
UEF
0.72Uniform energy factor
First-hour rating
79gallonsHot water in the first hour
See it among every gas storage model

Advertised and certified figures

State GPDT-50 3**: advertised and certified
State GPDT-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 0.72, certified 0.72. UEF: advertised 0.72, certified 0.72 (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 0.72 Certified 0.72 UEF · advertised up to Advertised 0.72 Certified 0.72
FigureAdvertisedCertifiedAdvertiserRead
Size 50 gal, nominal size 48 gal storage volume State Read Oct 5, 2026
Size 48 gal 48 gal storage volume State Read Oct 5, 2026
UEF 0.72 0.72 State Read Oct 5, 2026
UEF up to 0.72 0.72 State Read Oct 5, 2026
First-hour rating 81 gal 79 gal State Read Oct 5, 2026
First-hour rating 79 gal 79 gal State Read Oct 5, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
GS6-50-HBPDT 3*1480.727979%High
GS6-50-HBPDTL 3*1480.727979%High
GS6-50-YBPDT 3**480.727979%High
GS6-50-YBPDTL 3**480.727979%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. Starting full, it gives 79 gallons of hot water in its first hour of use. Reheating lets it give 31 gallons beyond the 48 gallons in its tank. Of 763 gas storage models, 344 give more hot water in the first hour. The median gas storage model gives 78 gallons in the first hour of the test.

As of Oct 26, 2026, it was not listed as ENERGY STAR certified. In tests, 72% of the energy it uses ends up as hot water (UEF 0.72). In the test, daily hot water use was set to high (its draw pattern). Of 434 gas storage models with the same draw pattern, 71 have a higher UEF. For its type and draw pattern, the UEF runs from 0.61 to 0.90. The water took in 79% of the energy used to reheat it (its recovery efficiency).

It is sold under 4 model numbers in all. There are 6 more basic models with the same test figures. Each of them is listed under a different brand. For the full group, see the A. O. Smith GPDT-50 3**.

In 2 states, 2 rebate programs may accept it.

Also listed as

They carry every figure in the table above.

Rebates

ProgramStateStatusProgram page
Xcel Energy MINNESOTA RESIDENTIAL ENERGY EFFICIENCY PROGRAMS (gas storage, gas tankless) MN May qualify Its own page
Avista Home and small commercial: HVAC and water heating incentives (gas storage) WA May qualify Its own page

Programs change their terms. Check the program's own page before you buy.

Updated Oct 26, 2026 · Methodology

Not covered

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