Rheem PROE28 S2 RH93 SB-HO
Rheem PROE28 S2 RH93 SB-HO is in the DOE listing as of Oct 26, 2026.
It has a labeled size of 28 gallons, a certified storage volume of 26 gallons, a certified UEF of 0.94, and a certified first-hour rating of 53 gallons of hot water.
Its advertised UEF of 0.94 from Rheem matches the certified 0.94 (Read Oct 4, 2026).
- Electric storage water heater
- 2 listed models
ENERGY STAR certification does not cover this type of water heater.
Certified figures
- Storage volume
- 26gallons
- UEF
- 0.94Uniform energy factor
- First-hour rating
- 53gallonsHot water in the first hour
Your busiest hour
Change your hourAdvertised and certified figures
| Figure | Advertised | Certified | Advertiser | Read |
|---|---|---|---|---|
| Size | 28 gal, nominal size | 26 gal storage volume | Rheem | Read Oct 4, 2026 |
| Size | 28 gal, nominal size | 26 gal storage volume | The Home Depot | Archived copy, Sep 9, 2025 |
| UEF | 0.94 | 0.94 | Rheem | Read Oct 4, 2026 |
| UEF | 0.92 | 0.94 | The Home Depot | Archived copy, Sep 9, 2025 |
| First-hour rating | 51 gal | 53 gal | The Home Depot | Archived copy, Sep 9, 2025 |
Certified figures by listed model
| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| PROE28 S2 RH93 SB-HO | 26 | 0.94 | 53 | 98% | Medium |
| XE28S06SB55U1 | 26 | 0.94 | 53 | 98% | Medium |
UEF is the uniform energy factor. A dash means the model has no such figure.
It holds 26 gallons in the test, 2 gallons less than its 28-gallon sold size. It delivers 53 gallons of hot water in the test's first hour. That is 27 gallons more than its tank holds, since it reheats during the hour. Of 477 electric storage models, 265 give more hot water in the first hour. Among electric storage models, the median first-hour rating is 55 gallons.
In the test, 6% of its energy does not reach the hot water (UEF 0.94). Its test simulated a day of medium hot water use (its draw pattern). Among 297 electric storage models on its draw pattern, 4 have a higher UEF. On its draw pattern, the median electric storage UEF is 0.92. The water took in 98% of the energy used to reheat it (its recovery efficiency).
Its 2 model numbers are PROE28 S2 RH93 SB-HO and XE28S06SB55U1. Its test figures match those of 2 other basic models. Those basic models are sold with Friedrich and Ruud as their brand names.
Also listed as
They carry every figure in the table above.
- Every Rheem basic model
- Every 30-gallon electric storage water heater
- Every electric storage water heater
Not covered
- Changes to an advertised figure after the date beside it.