Hot Water List
Menu

State GCBL-30R 4**

State GCBL-30R 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-30R 4**.

Storage volume
29gallons
UEF
0.60Uniform energy factor
First-hour rating
65gallonsHot water in the first hour
See it among every gas storage model

Advertised and certified figures

State GCBL-30R 4**: advertised and certified
State GCBL-30R 4**: advertised and certified Size: advertised 30 gal, certified 29 gal (advertised nominal size, certified storage volume). Size: advertised 29 gal, certified 29 gal (certified storage volume). UEF: advertised 0.60, certified 0.60. UEF: advertised 0.60, certified 0.60 (advertised up to). Size · advertised nominal size, certified storage volume Advertised 30 gal Certified 29 gal Size · certified storage volume Advertised 29 gal Certified 29 gal UEF Advertised 0.60 Certified 0.60 UEF · advertised up to Advertised 0.60 Certified 0.60
FigureAdvertisedCertifiedAdvertiserRead
Size 30 gal, nominal size 29 gal storage volume State Read Oct 4, 2026
Size 29 gal 29 gal storage volume State Read Oct 4, 2026
UEF 0.60 0.60 State Read Oct 4, 2026
UEF up to 0.60 0.60 State Read Oct 4, 2026
First-hour rating 65 gal 65 gal State Read Oct 4, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
GS6-30-ORBSR 4**290.606575%Medium
GS6-30-ORBSR 4*1290.606575%Medium

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

It holds 29 gallons in the test, 1 gallon less than its 30-gallon sold size. Over one hour from a full tank, it gave 65 gallons in the test (its first-hour rating). Reheating lets it give 36 gallons beyond the 29 gallons in its tank. Of 763 gas storage models, 600 give more hot water in the first hour. The median gas storage model gives 78 gallons in its first hour.

It was not listed as ENERGY STAR certified on Oct 26, 2026. In tests, 60% of the energy it uses ends up as hot water (UEF 0.60). Its test ran at the medium level of daily hot water use. Of 288 gas storage models with the same draw pattern, 88 have a higher UEF and 103 a lower one. For its type and draw pattern, its UEF sits at the median. When it reheats water in the test, 75% of the energy it uses ends up in the water.

Its 2 model numbers are GS6-30-ORBSR 4** and GS6-30-ORBSR 4*1. Its test figures match those of 4 other basic models. They are listed under 4 other brands, one each. For the full group, see the A. O. Smith GCBL-30R 4** 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.