A. O. SMITH ATI-180B-N 1** vs Vancepic VH19K-LPG: which uses less energy?
At the high draw pattern the A. O. SMITH ATI-180B-N 1** and the Vancepic VH19K-LPG 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 | A. O. SMITH ATI-180B-N 1** | Vancepic VH19K-LPG |
|---|---|---|
| UEF (Uniform Energy Factor) | 0.82 | 0.82 |
| Energy use per year (therms) | 206 | 206 |
| Max flow (GPM) | 4.7 | 8.5 |
| 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 A. O. SMITH ATI-180B-N 1** if its price or availability suits you — on energy the two are level.
- Pick the Vancepic VH19K-LPG if you run more fixtures at once: it lists 8.5 GPM against 4.7.
- Neither if you need more than 8.5 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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A. O. SMITH ATI-180B-N 1**
Its filed figures, class position and running cost on your ZIP.
-
Vancepic VH19K-LPG
Its filed figures, class position and running cost on your ZIP.