Bosch is German, founded 1886, strong in European combi boilers (Greenstar) and tankless (Greentherm). Bosch's US residential presence is smaller than Noritz's. Comparison:
Residential tankless
| Noritz NRC1111 | Bosch Greentherm T 9900i | |
|---|---|---|
| BTU | 199.9k | 199k |
| GPM | 11.1 | 10.6 |
| Heat exchanger warranty | 12 years | 15 years |
| Built-in recirc | EZTR series | No (external) |
| App | Less developed | Bosch Home Comfort (less mature) |
| US dealer network | Strong (with commercial focus) | Limited |
Roughly comparable products. Bosch has longer warranty. Noritz has wider US dealer network and integrated recirc option.
Combi boilers
Bosch Greenstar combi is a respected European-style combi line, particularly strong in cold-climate hydronic markets. Noritz NRCB is a competent but newer combi line with smaller US presence. For combi: Bosch has more European hydronic heritage; Noritz is improving but smaller market share.
Commercial
Noritz wins decisively. Bosch's commercial offerings are limited in the US compared to Noritz NCC cascade.
Engineering philosophy
- Bosch: conservative European hydronics design. Robust, simple, expensive
- Noritz: Japanese tankless engineering. Cascade-friendly, commercial-oriented
When to buy Noritz
- Commercial install
- You want EZTR built-in recirculation
- You're in a market with stronger Noritz dealer presence
When to buy Bosch
- You have a Bosch-experienced installer (some markets, especially New England, have strong Bosch hydronic specialists)
- European-style hydronic combi preferred
- Long-term ownership where the 15-year warranty matters
Bottom line
For commercial, Noritz wins. For residential, the choice is fit-dependent — Bosch has slightly longer warranty; Noritz has wider US dealer presence and integrated recirculation option. Decide based on local installer availability.