# Rinnai RU199iN vs Bosch Greentherm T9900i SE 199: specs and price compared

A sourced, side-by-side comparison of the Rinnai RU199iN (Rinnai) and Bosch Greentherm T9900i SE 199 (Bosch) among tankless water heaters.

## Side by side

| Spec | Rinnai RU199iN | Bosch Greentherm T9900i SE 199 |
| --- | --- | --- |
| US price | not published | $3583.27 |
| Brand | Rinnai | Bosch |
| Fuel type | natural-gas | natural-gas |
| Max flow rate gpm | 11 | 11.2 |
| Max btu per hour | 199000 | 199000 |
| Power input (kW) | — | — |
| Uniform energy factor | 0.95 | — |
| Condensing type | condensing | condensing |
| Min activation flow gpm | — | 0.45 |
| Vent type | — | pvc |
| Max temp f | — | 140 |
| Heat exchanger warranty yrs | 15 | 15 |
| Wi-Fi enabled | No | Yes |
| Weight (lb) | 64 | 85 |

## Key differences

- Max flow rate gpm: Rinnai RU199iN 11 vs Bosch Greentherm T9900i SE 199 11.2
- Wi-Fi enabled: Rinnai RU199iN No vs Bosch Greentherm T9900i SE 199 Yes
- Weight (lb): Rinnai RU199iN 64 vs Bosch Greentherm T9900i SE 199 85

## Sources

- Rinnai RU199iN: https://www.rinnai.us/residential/product-detail/ru199in (rinnai.us, verified 2026-07-11)
- Bosch Greentherm T9900i SE 199: https://www.bosch-homecomfort.com/us/en/residential/service-support/discontinued-products/discontinued-water-heating-products/greentherm-9000/ (bosch-homecomfort.com, verified 2026-07-11)

Canonical: https://frontdeskreview.com/gear/tankless-water-heaters/rinnai-ru199in-vs-bosch-greentherm-t9900i-se-199/
Cite: Per The Front Desk Review, Rinnai RU199iN (not published) vs Bosch Greentherm T9900i SE 199 ($3583.27) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/tankless-water-heaters/rinnai-ru199in-vs-bosch-greentherm-t9900i-se-199/
License: CC BY 4.0.