Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.
Stiebel Eltron Tempra 36 Plus comes out ahead by a narrow margin (4.7 vs 4.8). The gap is mostly about whole-home electric tankless installs in mild climates — read the strengths below before deciding.
The V75iN is the gas tankless pick — Rinnai's whole-home unit for households with natural gas service.
The Tempra 36 Plus is the best-overall pick — Stiebel Eltron's flow control handles whole-home demand without cold-water sandwiching.
Only gas pick. Highest flow at cold inlet. Wi-Fi.
Best whole-home pick. German engineering. Highest amperage required.
| Spec | Rinnai V75iN Gas Tankless | Stiebel Eltron Tempra 36 Plus |
|---|---|---|
| Type | Natural gas | Electric whole-home |
| Max GPM | 7.5 | — |
| Wi-Fi | Control-R | — |
| Install | Indoor or outdoor | — |
| Power | — | 36 kW |
| Flow Control | — | Advanced |
| Warranty | — | 10-year combined |