Richmond RTGH-S84I vs Vesta VTP-150: which uses less energy?
At the high draw pattern the Richmond RTGH-S84I and the Vesta VTP-150 use the same energy, 176 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 | Richmond RTGH-S84I | Vesta VTP-150 |
|---|---|---|
| UEF (Uniform Energy Factor) | 0.96 | 0.96 |
| Energy use per year (therms) | 176 | 176 |
| Max flow (GPM) | 4.6 | 4.7 |
| Installed cost range NLR REMDB | $2,405–$3,460 | $2,405–$3,460 |
| ENERGY STAR certified ENERGY STAR | yes | yes |
| On the market since ENERGY STAR | 2024-09-01 | 2023-10-16 |
| CPSC recall naming it CPSC | none on file (better) | recall 26026 |
DOE CCD · 2026-09-19 NLR REMDB · 2026-04-01 ENERGY STAR · 2026-09-19 CPSC · 2026-09-24
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 above.
- The Vesta VTP-150 is named in CPSC recall 26026; see the recall page for which units and the remedy.
- Both are ENERGY STAR certified, which requires a manufacturer warranty of at least six years; the actual term for each model is not published.
- Time on the market, as filed with ENERGY STAR: the Richmond RTGH-S84I since 2024-09-01, the Vesta VTP-150 since 2023-10-16. A sale date, not a lifespan.
Which should you pick?
- Pick the Vesta VTP-150 if you run more fixtures at once: it lists 4.7 GPM against 4.6.
- 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
- Richmond RTGH-S84I 176 therms a year
- Vesta VTP-150 176 therms a year