BOCK 33E
BOCK 33E is in the DOE listing as of Oct 26, 2026.
It has a certified storage volume of 30 gallons, a certified UEF of 0.67, and a certified first-hour rating of 140 gallons of hot water.
- Oil storage water heater
- 1 listed model
ENERGY STAR certification does not cover this type of water heater.
Certified figures
- Storage volume
- 30gallons
- UEF
- 0.67Uniform energy factor
- First-hour rating
- 140gallonsHot water in the first hour
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Change your hourCertified figures by listed model
| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| 33E | 30 | 0.67 | 140 | 75% | High |
UEF is the uniform energy factor. A dash means the model has no such figure.
Over one hour from a full tank, it gave 140 gallons in the test (its first-hour rating). Reheating lets it give 110 gallons beyond the 30 gallons in its tank. In the first hour, one of the 3 oil storage models gives more hot water. The median oil storage model gives the same amount in its first hour.
In the test, 33% of its energy does not reach the hot water (UEF 0.67). Its test simulated a day of high hot water use (its draw pattern). Of 3 oil storage models with the same draw pattern, one has a higher UEF. Its UEF is the median for its type and draw pattern. When it reheats water in the test, 75% of the energy it uses ends up in the water.
Not covered
- Advertised figures. We have none on file for this model.