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Lennox WHGS050S40NANE****

Lennox WHGS050S40NANE**** is in the DOE listing as of Oct 26, 2026.

  • Gas storage water heater
  • 1 listed model

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

Its figures are also listed under AMERICAN STANDARD WATER HEATERS GN50L2-3-*.

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

Lennox WHGS050S40NANE****: advertised and certified
Lennox WHGS050S40NANE****: advertised and certified Size: advertised 50 gal, certified 48 gal (advertised nominal size, 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 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 Lennox Read Oct 5, 2026
UEF 0.65 0.65 Lennox Read Oct 5, 2026
First-hour rating 78 gal 78 gal Lennox Read Oct 5, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
WHGS050S40NANE****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. It delivers 78 gallons of hot water in the test's first hour. That is 30 gallons more than its tank holds, since it reheats during the hour. Of 763 gas storage models, 366 give more hot water in the first hour. The median gas storage model gives the same amount in its first hour.

As of Oct 26, 2026, it was not listed as ENERGY STAR certified. In tests, 65% of the energy went to hot water, so its UEF is 0.65. In the test, daily hot water use was set to high (its draw pattern). Among 434 gas storage models on its draw pattern, 225 have a higher UEF. For its type and draw pattern, the UEF runs from 0.61 to 0.90. The water took in 78% of the energy used to reheat it (its recovery efficiency).

There are 2 more basic models with the same test figures. The AMERICAN STANDARD WATER HEATERS and Ariston brands list one or more of them. For the full group, see the AMERICAN STANDARD WATER HEATERS GN50L2-3-* page.

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.