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American GCBL-40 4**

American GCBL-40 4** is in the DOE listing as of Oct 26, 2026.

  • Gas storage water heater
  • 2 listed models

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

Its figures are also listed under A. O. Smith GCBL-40 4**.

Storage volume
38gallons
UEF
0.57Uniform energy factor
First-hour rating
68gallonsHot water in the first hour
See it among every gas storage model

Advertised and certified figures

American GCBL-40 4**: advertised and certified
American GCBL-40 4**: advertised and certified Size: advertised 40 gal, certified 38 gal (advertised nominal size, certified storage volume). Size: advertised 38 gal, certified 38 gal (certified storage volume). UEF: advertised 0.57, certified 0.57. First-hour rating: advertised 68 gal, certified 68 gal. Size · advertised nominal size, certified storage volume Advertised 40 gal Certified 38 gal Size · certified storage volume Advertised 38 gal Certified 38 gal UEF Advertised 0.57 Certified 0.57 First-hour rating Advertised 68 gal Certified 68 gal
FigureAdvertisedCertifiedAdvertiserRead
Size 40 gal, nominal size 38 gal storage volume American Read Oct 4, 2026
Size 38 gal 38 gal storage volume American Read Oct 4, 2026
UEF 0.57 0.57 American Read Oct 4, 2026
First-hour rating 68 gal 68 gal American Read Oct 4, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
GB61 40S40 4**380.576875%Medium
GB61 40S40 4*1380.576875%Medium

UEF is the uniform energy factor. A dash means the model has no such figure.

It holds 38 gallons in the test, 2 gallons less than its 40-gallon sold size. It delivers 68 gallons of hot water in the test's first hour. Reheating lets it give 30 gallons beyond the 38 gallons in its tank. In the first hour, 529 of the 763 gas storage models give more hot water. Among gas storage models, the median first-hour rating is 78 gallons.

On Oct 26, 2026, this heater was not listed as ENERGY STAR certified. In tests, 57% of the energy it uses ends up as hot water (UEF 0.57). Its test simulated a day of medium hot water use (its draw pattern). Among 288 gas storage models on its draw pattern, 277 have a higher UEF. For its type and draw pattern, the median UEF is 0.60. The water took in 75% of the energy used to reheat it (its recovery efficiency).

It is sold as GB61 40S40 4** and GB61 40S40 4*1. All of its test figures are shared by 5 other basic models. Each of the 5 other brands lists one of them. For the full group, see the A. O. Smith GCBL-40 4**.

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.