Bosch and Noritz overlap on residential tankless but have different specialty strengths.
Residential tankless
| Bosch Greentherm 9999 SE | Noritz NRC1111 | |
|---|---|---|
| BTU | 199k | 199k |
| GPM | 11.0 | 11.1 |
| Heat exchanger warranty | 15 years | 12 years |
| Built-in recirc | No | EZTR series only |
| App | Home Comfort | Less developed |
| Heat exchanger material | Stainless | ecoTOUGH 316L stainless |
Bosch has longer warranty. Noritz has heavier-gauge heat exchanger material and built-in recirculation option (EZTR).
Combi boilers
Bosch Greenstar vs Noritz NRCB. Bosch has stronger European combi heritage; Noritz NRCB is newer but competent. For US installs, comes down to installer experience.
Commercial cascade
Noritz wins decisively. NCC cascade is the segment leader. Bosch doesn't have a competitive commercial cascade product.
POU mini-tank
Bosch wins decisively. Noritz doesn't make POU mini-tanks.
When to buy Bosch
- POU mini-tanks
- European-style combi (Greenstar)
- You want longest residential tankless warranty
When to buy Noritz
- Commercial install (cascade dominance)
- Built-in tankless recirculation (EZTR)
- Compact tank-replacement with recirc (EZTR40 is unique)
Bottom line
Different specialties. For commercial: Noritz. For POU and European combi: Bosch. For standard residential gas tankless: both work; choose based on installer experience and warranty preference.