Stream 33 MEWH40S82S1
Stream 33 MEWH40S82S1 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
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| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| S33-40SEWH-4500 | 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. Reheating lets it give 18 gallons beyond the 37 gallons in its tank. In the first hour, 204 of the 477 electric storage models give more hot water. Its first-hour rating matches the median for electric storage models.
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 and 2 a lower one. For its type and draw pattern, its UEF sits at the median. The water took in 98% of the energy used to reheat it (its recovery efficiency).
All of its test figures are shared by 14 other basic models. In all, 7 other brands list one or more of them. You can find the whole group on the page for 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 D40-45FJ
- Midea MEWH40S82S1
- Midea MEWH40T82S1
- MRCOOL MEWH40S82S1
- MRCOOL MEWH40T82S1
- MRCOOL MTWH04540E
- MRCOOL MTWH04540ET
- RELIANCE WATER HEATERS ENS-40 1**
2 more basic models carry these figures.
- Every Stream 33 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.