Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.
Rheem RTEX-24 and Rinnai V75iN Gas Tankless score essentially the same (4.7 vs 4.7). Pick the one whose trade-offs match your priorities — the strengths and watch-outs below are where they actually differ.
The RTEX-24 is the cold-climate pick — Rheem's flagship that handles northern winter inlet temps better than competitors.
The V75iN is the gas tankless pick — Rinnai's whole-home unit for households with natural gas service.
Best for cold climates. Most user reviews. Cheaper than Tempra.
Only gas pick. Highest flow at cold inlet. Wi-Fi.
| Spec | Rheem RTEX-24 | Rinnai V75iN Gas Tankless |
|---|---|---|
| Type | Electric whole-home | Natural gas |
| Power | 24 kW | — |
| Self-Modulating | Yes | — |
| Reviews | 3,900+ | — |
| Max GPM | — | 7.5 |
| Wi-Fi | — | Control-R |
| Install | — | Indoor or outdoor |