RELIANCE WATER HEATERS GCFL-40 1**
RELIANCE WATER HEATERS GCFL-40 1** is in the DOE listing as of Oct 26, 2026.
- Gas storage water heater
- 4 listed models
Not listed as ENERGY STAR certified on Oct 26, 2026.
Its figures are also listed under A. O. Smith GCFL-40 1**.
Certified figures
- Storage volume
- 38gallons
- UEF
- 0.66Uniform energy factor
- First-hour rating
- 65gallonsHot water in the first hour
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| Figure | Advertised | Certified | Advertiser | Read |
|---|---|---|---|---|
| Size | 40 gal, nominal size | 38 gal storage volume | RELIANCE WATER HEATERS | Read Oct 4, 2026 |
| Size | 38 gal | 38 gal storage volume | RELIANCE WATER HEATERS | Read Oct 4, 2026 |
| UEF | 0.66 | 0.66 | RELIANCE WATER HEATERS | Read Oct 4, 2026 |
| First-hour rating | 65 gal | 65 gal | RELIANCE WATER HEATERS | Read Oct 4, 2026 |
Certified figures by listed model
| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| 6-40-GBFS 1** | 38 | 0.66 | 65 | 77% | Medium |
| 6-40-LBFS 1*1 | 38 | 0.66 | 65 | 77% | Medium |
| 9-40-GKFS 1** | 38 | 0.66 | 65 | 77% | Medium |
| 9-40-LKFS 1*1 | 38 | 0.66 | 65 | 77% | 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. Starting full, it gives 65 gallons of hot water in its first hour of use. That is 27 gallons more than its tank holds, since it reheats during the hour. Of 763 gas storage models, 600 give more hot water in the first hour. Among gas storage models, the median first-hour rating is 78 gallons.
It was not listed as ENERGY STAR certified on Oct 26, 2026. In tests, 66% of the energy went to hot water, so its UEF is 0.66. The daily hot water use in the test, called its draw pattern, was medium. Its UEF is lower than that of 26 of the 288 gas storage models with its draw pattern. For its type and draw pattern, the median UEF is 0.60. The water took in 77% of the energy used to reheat it (its recovery efficiency).
All 4 of its model numbers carry the same certified figures. All of its test figures are shared by 5 other basic models. They are listed under 5 other brands, one each. For the full group, see the A. O. Smith GCFL-40 1** page.
In one state, one rebate program may accept it.
Also listed as
They carry every figure in the table above.
Rebates
| Program | State | Status | Program page |
|---|---|---|---|
| Xcel Energy MINNESOTA RESIDENTIAL ENERGY EFFICIENCY PROGRAMS (gas storage, gas tankless) | MN | May qualify | Its own page |
Programs change their terms. Check the program's own page before you buy.
- Every RELIANCE WATER HEATERS basic model
- Every 40-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.