The NRCB combi line is Noritz's residential answer to Navien NCB. A single wall-mounted unit provides both space heating (radiators, baseboards, in-floor radiant) and domestic hot water — replacing a separate boiler and water heater.
NRCB lineup
| Model | DHW BTU | Heat BTU | DHW GPM | Typical home |
|---|---|---|---|---|
| NRCB180 | 180,000 | 130,000 | 4.2 | 2 bath |
| NRCB199 | 199,900 | 150,000 | 5.6 | 2-3 bath |
Outdoor variant (NRCB199-OD) available for warm-climate exterior installs.
When NRCB is the right answer
- You have hydronic heating (radiators, baseboards, in-floor) and need to replace it
- You want to consolidate boiler + water heater into one unit
- You have limited mechanical room space
When NRCB is NOT the right answer
- You have forced-air heat — your home doesn't need a boiler; use NRC tankless
- Very large homes with high heat demand — consider separate NCC commercial + dedicated heating boiler
- Budget is tight — combi installs add hydronic plumbing complexity
NRCB vs Navien NCB
Navien is the volume leader in residential combi boilers; Noritz NRCB is a competent but smaller-market alternative. Key differences:
- Navien NCB lineup spans 180k-300k BTU; NRCB is 180k-199k only
- Navien has more US dealer presence for combi specifically
- Noritz has slightly longer parts warranty in commercial use
For most US residential combi installs, the choice is between NRCB199 and Navien NCB-240 — both competent, decision often comes down to local installer experience.
Hydronic install requirements
Same as any combi boiler — primary/secondary loop, expansion tank, air separator, outdoor reset, backflow preventer. Use a Noritz-trained commercial installer or hydronics-experienced contractor.
Warranty
10 years heat exchanger / 5 years parts / 1 year labor — residential.
Pricing
- NRCB180: $2,599-2,999
- NRCB199: $2,899-3,299
- NRCB199-OD outdoor: $2,799-3,199
Installation adds $3,500-7,000+ depending on hydronic complexity.
Bottom line
NRCB is the right call when replacing a boiler + water heater pair with a single high-efficiency unit. For 2-bath homes, NRCB180; for 2-3 bath, NRCB199. Use a hydronics-experienced installer regardless of brand.