# Rinnai RU199iN vs Stiebel Eltron Tempra 36 Plus: specs and price compared

A sourced, side-by-side comparison of the Rinnai RU199iN (Rinnai) and Stiebel Eltron Tempra 36 Plus (Stiebel Eltron) among tankless water heaters.

## Side by side

| Spec | Rinnai RU199iN | Stiebel Eltron Tempra 36 Plus |
| --- | --- | --- |
| US price | not published | $1132 |
| Brand | Rinnai | Stiebel Eltron |
| Fuel type | natural-gas | electric |
| Max flow rate gpm | 11 | 8.2 |
| Max btu per hour | 199000 | — |
| Power input (kW) | — | 36 |
| Uniform energy factor | 0.95 | — |
| Condensing type | condensing | electric |
| Min activation flow gpm | — | 0.77 |
| Vent type | — | none |
| Max temp f | — | 140 |
| Heat exchanger warranty yrs | 15 | 7 |
| Wi-Fi enabled | No | No |
| Weight (lb) | 64 | 17.6 |

## Key differences

- Fuel type: Rinnai RU199iN natural-gas vs Stiebel Eltron Tempra 36 Plus electric
- Max flow rate gpm: Rinnai RU199iN 11 vs Stiebel Eltron Tempra 36 Plus 8.2
- Condensing type: Rinnai RU199iN condensing vs Stiebel Eltron Tempra 36 Plus electric
- Heat exchanger warranty yrs: Rinnai RU199iN 15 vs Stiebel Eltron Tempra 36 Plus 7
- Weight (lb): Rinnai RU199iN 64 vs Stiebel Eltron Tempra 36 Plus 17.6

## Sources

- Rinnai RU199iN: https://www.rinnai.us/residential/product-detail/ru199in (rinnai.us, verified 2026-07-11)
- Stiebel Eltron Tempra 36 Plus: https://www.stiebel-eltron-usa.com/products/tempra-plus-whole-house-electric-tankless-water-heaters (stiebel-eltron-usa.com, verified 2026-07-11)

Canonical: https://frontdeskreview.com/gear/tankless-water-heaters/rinnai-ru199in-vs-stiebel-eltron-tempra-36-plus/
Cite: Per The Front Desk Review, Rinnai RU199iN (not published) vs Stiebel Eltron Tempra 36 Plus ($1132) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/tankless-water-heaters/rinnai-ru199in-vs-stiebel-eltron-tempra-36-plus/
License: CC BY 4.0.