A. O. Smith GCRL-50 4**
A. O. Smith GCRL-50 4** is in the DOE listing as of Oct 26, 2026.
It has a labeled size of 50 gallons, a certified storage volume of 50 gallons, a certified UEF of 0.62, and a certified first-hour rating of 81 gallons of hot water.
Its advertised UEF of 0.62 from A. O. Smith matches the certified 0.62 (Read Oct 5, 2026).
- Gas storage water heater
- 7 listed models
Not listed as ENERGY STAR certified on Oct 26, 2026.
Certified figures
- Storage volume
- 50gallons
- UEF
- 0.62Uniform energy factor
- First-hour rating
- 81gallonsHot water in the first hour
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| Figure | Advertised | Certified | Advertiser | Read |
|---|---|---|---|---|
| Size | 50 gal, nominal size | 50 gal storage volume | A. O. Smith | Read Oct 5, 2026 |
| Size | 50 gal | 50 gal storage volume | A. O. Smith | Read Oct 5, 2026 |
| UEF | 0.62 | 0.62 | A. O. Smith | Read Oct 5, 2026 |
| UEF | up to 0.62 | 0.62 | A. O. Smith | Read Oct 5, 2026 |
| First-hour rating | 81 gal | 81 gal | A. O. Smith | Read Oct 5, 2026 |
Certified figures by listed model
| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| G6-S5040NV 4** | 50 | 0.62 | 81 | 77% | High |
| GCRL-50 4** | 50 | 0.62 | 81 | 77% | High |
| GCRL-50 4*1 | 50 | 0.62 | 81 | 77% | High |
| HWRL-50 4** | 50 | 0.62 | 81 | 77% | High |
| HWRL-50 4*1 | 50 | 0.62 | 81 | 77% | High |
| XCRL-50 4** | 50 | 0.62 | 81 | 77% | High |
| XCRL-50 4*1 | 50 | 0.62 | 81 | 77% | High |
UEF is the uniform energy factor. A dash means the model has no such figure.
Sold as 50 gallons, it holds 50 gallons in the test. Over one hour from a full tank, it gave 81 gallons in the test (its first-hour rating). That is 31 gallons more than its tank holds, since it reheats during the hour. Among 763 gas storage models, 295 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, 62% of the energy it uses ends up as hot water (UEF 0.62). In the test, daily hot water use was set to high (its draw pattern). Of 434 gas storage models with the same draw pattern, 386 have a higher UEF and 15 a lower one. For its type and draw pattern, the median UEF is 0.66. The water took in 77% of the energy used to reheat it (its recovery efficiency).
It is sold under 7 model numbers in all. All of its test figures are shared by 4 other basic models. Each of the 4 other brands lists one of them.
Also listed as
They carry every figure in the table above.
- Every A. O. Smith basic model
- Every 50-gallon gas storage water heater
- Every gas storage water heater
- The most-searched gas storage models side by side
Not covered
- Changes to an advertised figure after the date beside it.