# Navien NPE-240A2 vs Bosch Greentherm T9900i SE 199: specs and price compared

A sourced, side-by-side comparison of the Navien NPE-240A2 (Navien) and Bosch Greentherm T9900i SE 199 (Bosch) among tankless water heaters. Navien NPE-240A2 is the cheaper of the two at $2099.

## Side by side

| Spec | Navien NPE-240A2 | Bosch Greentherm T9900i SE 199 |
| --- | --- | --- |
| US price | $2099 | $3583.27 |
| Brand | Navien | Bosch |
| Fuel type | natural-gas | natural-gas |
| Max flow rate gpm | 11.2 | 11.2 |
| Max btu per hour | 199900 | 199000 |
| Power input (kW) | — | — |
| Uniform energy factor | 0.95 | — |
| Condensing type | condensing | condensing |
| Min activation flow gpm | 0.5 | 0.45 |
| Vent type | pvc | pvc |
| Max temp f | — | 140 |
| Heat exchanger warranty yrs | 15 | 15 |
| Wi-Fi enabled | No | Yes |
| Weight (lb) | 77 | 85 |

## Key differences

- Max btu per hour: Navien NPE-240A2 199900 vs Bosch Greentherm T9900i SE 199 199000
- Min activation flow gpm: Navien NPE-240A2 0.5 vs Bosch Greentherm T9900i SE 199 0.45
- Wi-Fi enabled: Navien NPE-240A2 No vs Bosch Greentherm T9900i SE 199 Yes
- Weight (lb): Navien NPE-240A2 77 vs Bosch Greentherm T9900i SE 199 85

## Sources

- Navien NPE-240A2: https://www.navieninc.com/products/npe-240a2 (navieninc.com, 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/navien-npe-240a2-vs-bosch-greentherm-t9900i-se-199/
Cite: Per The Front Desk Review, Navien NPE-240A2 ($2099) vs Bosch Greentherm T9900i SE 199 ($3583.27) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/tankless-water-heaters/navien-npe-240a2-vs-bosch-greentherm-t9900i-se-199/
License: CC BY 4.0.