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State GCR-50 4**

State GCR-50 4** is in the DOE listing as of Oct 26, 2026.

  • Gas storage water heater
  • 9 listed models

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

Its figures are also listed under A. O. Smith GCR-50 4**.

Storage volume
48gallons
UEF
0.62Uniform energy factor
First-hour rating
84gallonsHot water in the first hour
See it among every gas storage model

Advertised and certified figures

State GCR-50 4**: advertised and certified
State GCR-50 4**: 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 0.62, certified 0.62. UEF: advertised 0.62, certified 0.62 (advertised up to). 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 0.62 Certified 0.62 UEF · advertised up to Advertised 0.62 Certified 0.62
FigureAdvertisedCertifiedAdvertiserRead
Size 50 gal, nominal size 48 gal storage volume State Read Oct 5, 2026
Size 48 gal 48 gal storage volume State Read Oct 5, 2026
UEF 0.62 0.62 State Read Oct 5, 2026
UEF up to 0.62 0.62 State Read Oct 5, 2026
First-hour rating 84 gal 84 gal State Read Oct 5, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
GS X 50 BCT 4*1480.628477%High
GS6-50-BCT 4**480.628477%High
GS6-50-BCT 4*1480.628477%High
GS6-50-BCTL 4**480.628477%High
GS6-50-BCTL 4*1480.628477%High
GSX-50-BCT 4**480.628477%High
GSX-50-BCTL 4**480.628477%High
GW8-50-BCT 4**480.628477%High
GW8-50-BCT 4*1480.628477%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 84 gallons of hot water in its first hour of use. Its tank holds 48 gallons, so reheating adds 36 gallons during the first hour. Of 763 gas storage models, 209 give more hot water in the first hour. The median gas storage model gives 78 gallons in its first hour.

On Oct 26, 2026, this heater was not listed as ENERGY STAR certified. In the test, 38% of its energy does not reach the hot water (UEF 0.62). The daily hot water use in the test, called its draw pattern, was high. Among 434 gas storage models on its draw pattern, 386 have a higher UEF. A UEF of 0.66 is the median for its type and draw pattern. When it reheats water in the test, 77% of the energy it uses ends up in the water.

All 9 of its model numbers carry the same certified figures. Its test figures match those of 4 other basic models. Each of them is listed under a different brand. For the full group, see the A. O. Smith GCR-50 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.