# Bosch Greentherm T9900i SE 199 vs Stiebel Eltron Tempra 36 Plus: specs and price compared

A sourced, side-by-side comparison of the Bosch Greentherm T9900i SE 199 (Bosch) and Stiebel Eltron Tempra 36 Plus (Stiebel Eltron) among tankless water heaters. Stiebel Eltron Tempra 36 Plus is the cheaper of the two at $1132.

## Side by side

| Spec | Bosch Greentherm T9900i SE 199 | Stiebel Eltron Tempra 36 Plus |
| --- | --- | --- |
| US price | $3583.27 | $1132 |
| Brand | Bosch | Stiebel Eltron |
| Fuel type | natural-gas | electric |
| Max flow rate gpm | 11.2 | 8.2 |
| Max btu per hour | 199000 | — |
| Power input (kW) | — | 36 |
| Uniform energy factor | — | — |
| Condensing type | condensing | electric |
| Min activation flow gpm | 0.45 | 0.77 |
| Vent type | pvc | none |
| Max temp f | 140 | 140 |
| Heat exchanger warranty yrs | 15 | 7 |
| Wi-Fi enabled | Yes | No |
| Weight (lb) | 85 | 17.6 |

## Key differences

- Fuel type: Bosch Greentherm T9900i SE 199 natural-gas vs Stiebel Eltron Tempra 36 Plus electric
- Max flow rate gpm: Bosch Greentherm T9900i SE 199 11.2 vs Stiebel Eltron Tempra 36 Plus 8.2
- Condensing type: Bosch Greentherm T9900i SE 199 condensing vs Stiebel Eltron Tempra 36 Plus electric
- Min activation flow gpm: Bosch Greentherm T9900i SE 199 0.45 vs Stiebel Eltron Tempra 36 Plus 0.77
- Vent type: Bosch Greentherm T9900i SE 199 pvc vs Stiebel Eltron Tempra 36 Plus none
- Heat exchanger warranty yrs: Bosch Greentherm T9900i SE 199 15 vs Stiebel Eltron Tempra 36 Plus 7
- Wi-Fi enabled: Bosch Greentherm T9900i SE 199 Yes vs Stiebel Eltron Tempra 36 Plus No
- Weight (lb): Bosch Greentherm T9900i SE 199 85 vs Stiebel Eltron Tempra 36 Plus 17.6

## Sources

- 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)
- 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/bosch-greentherm-t9900i-se-199-vs-stiebel-eltron-tempra-36-plus/
Cite: Per The Front Desk Review, Bosch Greentherm T9900i SE 199 ($3583.27) vs Stiebel Eltron Tempra 36 Plus ($1132) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/tankless-water-heaters/bosch-greentherm-t9900i-se-199-vs-stiebel-eltron-tempra-36-plus/
License: CC BY 4.0.