A. O. Smith GCR-50 4**
A. O. Smith GCR-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 48 gallons, a certified UEF of 0.62, and a certified first-hour rating of 84 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
- 13 listed models
Not listed as ENERGY STAR certified on Oct 26, 2026.
Certified figures
- Storage volume
- 48gallons
- UEF
- 0.62Uniform energy factor
- First-hour rating
- 84gallonsHot water in the first hour
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| Figure | Advertised | Certified | Advertiser | Read |
|---|---|---|---|---|
| Size | 50 gal, nominal size | 48 gal storage volume | A. O. Smith | Read Oct 5, 2026 |
| Size | 48 gal | 48 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 | 84 gal | 84 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 |
|---|---|---|---|---|---|
| G12-T5040NVR 4** | 48 | 0.62 | 84 | 77% | High |
| G6-T5040NVR 4** | 48 | 0.62 | 84 | 77% | High |
| G9-T5040NVR 4** | 48 | 0.62 | 84 | 77% | High |
| GCR-50 4** | 48 | 0.62 | 84 | 77% | High |
| GCR-50 4*1 | 48 | 0.62 | 84 | 77% | High |
| GCR-50L 4** | 48 | 0.62 | 84 | 77% | High |
| GCR-50L 4*1 | 48 | 0.62 | 84 | 77% | High |
| HWR-50 4** | 48 | 0.62 | 84 | 77% | High |
| HWR-50 4*1 | 48 | 0.62 | 84 | 77% | High |
| XCR-50 4** | 48 | 0.62 | 84 | 77% | High |
| XCR-50 4*1 | 48 | 0.62 | 84 | 77% | High |
| XCR-50L 4** | 48 | 0.62 | 84 | 77% | High |
| XCR-50L 4*1 | 48 | 0.62 | 84 | 77% | 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. It delivers 84 gallons of hot water in the test's first hour. Reheating lets it give 36 gallons beyond the 48 gallons in its tank. 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.
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). Its test simulated a day of high hot water use (its draw pattern). Of 434 gas storage models with the same draw pattern, 386 have a higher UEF. For its type and draw pattern, the median UEF is 0.66. Of the energy spent to reheat water, 77% goes into it (its recovery efficiency).
A tag or quote may show any of its 13 model numbers. There are 4 more basic models with the same test figures. Each of them is listed under a different brand.
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.