Rinnai
Rinnai RU199iN
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Best Tankless Water Heaters · head-to-head
Rinnai RU199iN vs Navien NPE-240A2
A sourced, side-by-side comparison. Navien NPE-240A2 is cheaper at $2099. Every spec and price links to its source.
Navien
Navien NPE-240A2
$2099
Which is better: the Rinnai RU199iN or Navien NPE-240A2?
The Rinnai RU199iN wins 1 of the 1 specs we compare head to head; the other wins 0.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec |  Rinnai RU199iN |  Navien NPE-240A2 |
|---|---|---|
| US price | — | $2099 |
| Brand | Rinnai | Navien |
| Released | — | — |
| Fuel type | natural-gas | natural-gas |
| Max flow rate (gpm) | 11 | 11.2 |
| Max btu per hour | 199000 | 199900 |
| Power input (kW) | — | — |
| Uniform energy factor | 0.95 | 0.95 |
| Condensing type | condensing | condensing |
| Min activation flow (gpm) | — | 0.5 |
| Vent type | — | pvc |
| Max temp (°F) | — | — |
| Heat exchanger warranty yrs | 15 | 15 |
| Wi-Fi enabled | No | No |
| Weight (lb) | 64 | 77 |
Sources — Rinnai RU199iN: rinnai.us (verified 2026-07-11). Navien NPE-240A2: navieninc.com (verified 2026-07-11).
What's the difference between the Rinnai RU199iN and Navien NPE-240A2?
Where the two actually differ on the specs we track (3 of 12). Matching specs are omitted.
- Max flow rate (gpm): Rinnai RU199iN 11 vs Navien NPE-240A2 11.2
- Max btu per hour: Rinnai RU199iN 199000 vs Navien NPE-240A2 199900
- Weight (lb): Rinnai RU199iN 64 vs Navien NPE-240A2 77