KENDRAJA KEN -DJ18-01 vs Ranein RE13K: which uses less energy?
At the medium draw pattern the KENDRAJA KEN -DJ18-01 uses 3,456 kWh a year and the Ranein RE13K 3,531 — 75 kWh (2%) less, about 751 kWh over ten years. Both are filed as an electric tankless unit, so the comparison holds. Enter your ZIP below to price the difference.
Side by side
Compared within one class only: models filed as an electric tankless unit at the medium draw pattern.
| Figure | KENDRAJA KEN -DJ18-01 | Ranein RE13K |
|---|---|---|
| UEF (Uniform Energy Factor) | 0.94 (better) | 0.92 |
| Energy use per year (kWh) | 3,456 (better) | 3,531 |
| Max flow (GPM) | 1.8 | 3.1 |
| Installed cost range | $1,300–$1,790 | $1,294–$1,742 |
| ENERGY STAR certified | not matched | not matched |
What it costs to run
Reliability
Not published: Reliability, failure rates and each model’s actual warranty term.
The registries these figures come from certify energy performance under a federal test; none of them records how long a unit lasts or how often it fails, so this page does not rank the two on reliability.
What is here instead:
- The filed efficiency, capacity and tank size of both models, side by side below.
- The actual warranty term is printed in each model’s documentation, not in any registry.
Which should you pick?
- Pick the KENDRAJA KEN -DJ18-01 if running cost matters most: it uses 75 kWh less a year on the same test.
- Pick the Ranein RE13K if you run more fixtures at once: it lists 3.1 GPM against 1.8.
- Neither if you need more than 3.1 GPM at the same time — neither unit lists more. Check how to size a tankless unit by GPM.
Each model on its own
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KENDRAJA KEN -DJ18-01
Its filed figures, class position and running cost on your ZIP.
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Ranein RE13K
Its filed figures, class position and running cost on your ZIP.