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AMERICAN STANDARD WATER HEATERS GN50T2-3-*

AMERICAN STANDARD WATER HEATERS GN50T2-3-* 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 0.66, and a certified first-hour rating of 86 gallons of hot water.

Its advertised UEF of 0.66 from AMERICAN STANDARD WATER HEATERS matches the certified 0.66 (Read Oct 5, 2026).

  • Gas storage water heater
  • 1 listed model

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

Storage volume
47gallons
UEF
0.66Uniform energy factor
First-hour rating
86gallonsHot water in the first hour
See it among every gas storage model

Advertised and certified figures

AMERICAN STANDARD WATER HEATERS GN50T2-3-*: advertised and certified
AMERICAN STANDARD WATER HEATERS GN50T2-3-*: 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 0.66, certified 0.66. First-hour rating: advertised 86 gal, certified 86 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 0.66 Certified 0.66 First-hour rating Advertised 86 gal Certified 86 gal
FigureAdvertisedCertifiedAdvertiserRead
Size 50 gal, nominal size 47 gal storage volume AMERICAN STANDARD WATER HEATERS Read Oct 5, 2026
Size 47 gal 47 gal storage volume AMERICAN STANDARD WATER HEATERS Read Oct 5, 2026
UEF 0.66 0.66 AMERICAN STANDARD WATER HEATERS Read Oct 5, 2026
First-hour rating 86 gal 86 gal AMERICAN STANDARD WATER HEATERS Read Oct 5, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
GN50T2-3-*470.668680%High

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. It delivers 86 gallons of hot water in the test's first hour. Its tank holds 47 gallons, so reheating adds 39 gallons during the first hour. Of 763 gas storage models, 162 give more hot water in the first hour. 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 tests, 66% of the energy went to hot water, so its UEF is 0.66. Its test ran at the high level of daily hot water use. Its UEF is lower than that of 213 of the 434 gas storage models with its draw pattern. On its draw pattern, its UEF is also the median gas storage UEF. Of the energy spent to reheat water, 80% goes into it (its recovery efficiency).

There are 2 more basic models with the same test figures. Those basic models are sold with Ariston and Lennox as their brand names.

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.