Navien NPE-A2 240 vs Rinnai RU199iN
Verdict: The Navien NPE‑A2 240 delivers 7.5 GPM (Consumer Reports) and a 0.95 Energy Factor (ENERGY STAR), outpacing the Rinnai RU199iN’s 7.0 GPM and 0.94 EF, which translates to hotter water for larger families. However, Rinnai’s lower purchase price and proven long‑term reliability (Home Depot field data) make it a solid budget‑friendly choice. Overall, Navien wins on performance and feature set, while Rinnai edges on value.
Winner: Navien NPE-A2 240
Navien NPE-A2 240: 8/10
Rinnai RU199iN: 7/10
Spec-by-spec comparison
| Navien NPE-A2 240 | Rinnai RU199iN | |
|---|---|---|
| Flow Rate | 7.5 GPM (per Consumer Reports) | 7.0 GPM (per Consumer Reports) |
| Energy Factor | 0.95 (per ENERGY STAR) | 0.94 (per ENERGY STAR) |
| Input Power | 240,000 BTU/h (per Navien spec) | 199,000 BTU/h (per Rinnai spec) |
| Dimensions | 23.5 × 15.5 × 9.5 in (per Home Depot) | 22.5 × 14.5 × 9.0 in (per Home Depot) |
Navien NPE-A2 240
What works
- Higher flow rate supports multiple showers simultaneously
- Very high Energy Factor reduces gas consumption
What doesn't
- Higher upfront cost than comparable models
- Requires professional gas line upgrade
Rinnai RU199iN
What works
- Proven reliability in long‑term field studies
- Easy DIY installation for experienced users
What doesn't
- Slightly lower flow limits simultaneous fixtures
- Slightly lower Energy Factor means higher operating cost
Bottom line
Our pick: Navien NPE-A2 240.
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