Midea D40-45FJ
Midea D40-45FJ is in the DOE listing as of Oct 19, 2026.
- Electric storage water heater
- 1 listed model
ENERGY STAR certification does not cover this type of water heater.
Its figures are also listed under A. O. Smith ENS-40 1**.
Certified figures
- Storage volume
- 37gallons
- UEF
- 0.92Uniform energy factor
- First-hour rating
- 55gallonsHot water in the first hour
Your busiest hour
Change your hourCertified figures by listed model
| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| D40-45FJ | 37 | 0.92 | 55 | 98% | Medium |
UEF is the uniform energy factor. A dash means the model has no such figure.
It holds 37 gallons in the test, 3 gallons less than its 40-gallon sold size. It delivers 55 gallons of hot water in the test's first hour. Its tank holds 37 gallons, so reheating adds 18 gallons during the first hour. Of 477 electric storage models, 204 give more hot water in the first hour. The median electric storage model gives the same amount in its first hour.
In tests, 92% of the energy it uses ends up as hot water (UEF 0.92). The daily hot water use in the test, called its draw pattern, was medium. Of 297 electric storage models with the same draw pattern, 81 have a higher UEF. On its draw pattern, its UEF is also the median electric storage UEF. Of the energy spent to reheat water, 98% goes into it (its recovery efficiency).
Its test figures match those of 14 other basic models. Between them, those basic models carry 7 other brand names. For the full group, see the A. O. Smith ENS-40 1**.
Also listed as
They carry every figure in the table above.
- A. O. Smith ENS-40 1**
- American ENS-40 1**
- Lochinvar ENS-40 1**
- Midea D40-45FH
- Midea MEWH40S82S1
- Midea MEWH40T82S1
- MRCOOL MEWH40S82S1
- MRCOOL MEWH40T82S1
- MRCOOL MTWH04540E
- MRCOOL MTWH04540ET
- RELIANCE WATER HEATERS ENS-40 1**
- State ENS-40 1**
2 more basic models carry these figures.
- Every Midea basic model
- Every 40-gallon electric storage water heater
- Every electric storage water heater
Not covered
- Advertised figures. We have none on file for this model.