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AMERICAN STANDARD WATER HEATERS GN50L2-3-*

AMERICAN STANDARD WATER HEATERS GN50L2-3-* 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 0.65, and a certified first-hour rating of 78 gallons of hot water.

Its advertised UEF of 0.65 from AMERICAN STANDARD WATER HEATERS matches the certified 0.65 (Read Oct 5, 2026).

  • Gas storage water heater
  • 1 listed model

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

Storage volume
48gallons
UEF
0.65Uniform energy factor
First-hour rating
78gallonsHot water in the first hour
See it among every gas storage model

Advertised and certified figures

AMERICAN STANDARD WATER HEATERS GN50L2-3-*: advertised and certified
AMERICAN STANDARD WATER HEATERS GN50L2-3-*: 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 0.65, certified 0.65. First-hour rating: advertised 78 gal, certified 78 gal. 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 First-hour rating Advertised 78 gal Certified 78 gal
FigureAdvertisedCertifiedAdvertiserRead
Size 50 gal, nominal size 48 gal storage volume AMERICAN STANDARD WATER HEATERS Read Oct 5, 2026
Size 48 gal 48 gal storage volume AMERICAN STANDARD WATER HEATERS Read Oct 5, 2026
UEF 0.65 0.65 AMERICAN STANDARD WATER HEATERS Read Oct 5, 2026
First-hour rating 78 gal 78 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
GN50L2-3-*480.657878%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 78 gallons of hot water in its first hour of use. Its tank holds 48 gallons, so reheating adds 30 gallons during the first hour. In the first hour, 366 of the 763 gas storage models give more hot water. In first-hour rating, it ties the median gas storage model.

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). Among 434 gas storage models on its draw pattern, 225 have a higher UEF. On its draw pattern, the median gas storage UEF is 0.66. The water took in 78% of the energy used to reheat it (its recovery efficiency).

Its test figures match those of 2 other basic models. 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.