John Wood GCF-40 1**
John Wood GCF-40 1** 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 GCF-40 1**.
Certified figures
- Storage volume
- 38gallons
- UEF
- 0.64Uniform energy factor
- First-hour rating
- 70gallonsHot water in the first hour
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| Figure | Advertised | Certified | Advertiser | Read |
|---|---|---|---|---|
| Size | 40 gal, nominal size | 38 gal storage volume | John Wood | Read Oct 5, 2026 |
| UEF | 0.64 | 0.64 | John Wood | Read Oct 5, 2026 |
| First-hour rating | 67 gal | 70 gal | John Wood | Read Oct 5, 2026 |
Certified figures by listed model
| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| JW640T40N-AV-ES2 1** | 38 | 0.64 | 70 | 73% | Medium |
| JW640T40P-AV-ES2 1*1 | 38 | 0.64 | 70 | 73% | 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 70 gallons of hot water in its first hour of use. Its tank holds 38 gallons, so reheating adds 32 gallons during the first hour. In the first hour, 510 of the 763 gas storage models give more hot water. The median gas storage model gives 78 gallons in the first hour of the test.
On Oct 26, 2026, this heater was not listed as ENERGY STAR certified. In the test, 36% of its energy does not reach the hot water (UEF 0.64). In the test, daily hot water use was set to medium (its draw pattern). Its UEF is lower than that of 43 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 73% of the energy used to reheat it (its recovery efficiency).
It is sold as JW640T40N-AV-ES2 1** and JW640T40P-AV-ES2 1*1. There are 5 more basic models with the same test figures. Each of them is listed under a different brand. For the full group, see the A. O. Smith GCF-40 1**.
It may qualify for one rebate program in one state.
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 John Wood 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.