eyoo EO11K-W vs Noritz NR83DVC (GQ-2457WS-FFA US): which uses less energy?
At the high draw pattern the eyoo EO11K-W and the Noritz NR83DVC (GQ-2457WS-FFA US) use the same energy, 206 therms a year each, on the same federal test. Both are filed as a gas tankless unit, so the comparison holds; what separates them is below. Enter your ZIP to price either one on your own rate.
Side by side
Compared within one class only: models filed as a gas tankless unit at the high draw pattern.
| Figure | eyoo EO11K-W | Noritz NR83DVC (GQ-2457WS-FFA US) |
|---|---|---|
| UEF (Uniform Energy Factor) | 0.82 | 0.82 |
| Energy use per year (therms) | 206 | 206 |
| Max flow (GPM) | 4.7 | 4.6 |
| Installed cost range | $1,745–$2,687 | $1,745–$2,687 |
| 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 eyoo EO11K-W if its price or availability suits you — on energy the two are level.
- Pick the Noritz NR83DVC (GQ-2457WS-FFA US) if it is the one you can get installed sooner or for less — on the filed figures it has no advantage over the eyoo EO11K-W.
- Neither if you need more than 4.7 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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eyoo EO11K-W
Its filed figures, class position and running cost on your ZIP.
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Noritz NR83DVC (GQ-2457WS-FFA US)
Its filed figures, class position and running cost on your ZIP.