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Lennox WHGS050T40NANS****

Lennox WHGS050T40NANS**** 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 GN50T1-3-*.

Storage volume
47gallons
UEF
0.63Uniform energy factor
First-hour rating
85gallonsHot water in the first hour
See it among every gas storage model

Advertised and certified figures

Lennox WHGS050T40NANS****: advertised and certified
Lennox WHGS050T40NANS****: advertised and certified Size: advertised 50 gal, certified 47 gal (advertised nominal size, certified storage volume). UEF: advertised 0.63, certified 0.63. First-hour rating: advertised 85 gal, certified 85 gal. Size · advertised nominal size, certified storage volume Advertised 50 gal Certified 47 gal UEF Advertised 0.63 Certified 0.63 First-hour rating Advertised 85 gal Certified 85 gal
FigureAdvertisedCertifiedAdvertiserRead
Size 50 gal, nominal size 47 gal storage volume Lennox Read Oct 5, 2026
UEF 0.63 0.63 Lennox Read Oct 5, 2026
First-hour rating 85 gal 85 gal Lennox Read Oct 5, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
WHGS050T40NANS****470.638584%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. Over one hour from a full tank, it gave 85 gallons in the test (its first-hour rating). Its tank holds 47 gallons, so reheating adds 38 gallons during the first hour. Among 763 gas storage models, 192 have a higher first-hour rating. 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, 63% of the energy went to hot water, so its UEF is 0.63. Its test ran at the high level of daily hot water use. Among 434 gas storage models on its draw pattern, 339 have a higher UEF. On its draw pattern, the median gas storage UEF is 0.66. Of the energy spent to reheat water, 84% goes into it (its recovery efficiency).

All of its test figures are shared by 2 other basic models. The AMERICAN STANDARD WATER HEATERS and Ariston brands list one or more of them. For the full group, see the AMERICAN STANDARD WATER HEATERS GN50T1-3-* 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.