Navien Boiler Manuals
Select your Navien model number below for installation steps, settings, maintenance schedules, troubleshooting and the full specification sheet. Your model number is printed on the rating plate.
Navien boilers by model number
| Model | Description | Certified |
|---|---|---|
| NCB-190/060HNCB-190/60H | 95% AFUE condensing gas boiler | November 2021 |
| NCB-190/080HNCB-190/80H | 95% AFUE condensing gas boiler | November 2021 |
| NCB-240/110H | 95% AFUE condensing gas boiler | November 2021 |
| NCB-240/130H | 95% AFUE condensing gas boiler | November 2021 |
| NCB-250/150H | 95% AFUE condensing gas boiler | November 2021 |
| NCB700-190/060 | 96% AFUE condensing gas boiler | August 2026 |
| NCB700-190/080 | 96% AFUE condensing gas boiler | August 2026 |
| NCB700-240/110 | 96% AFUE condensing gas boiler | August 2026 |
| NCB700-240/130 | 96% AFUE condensing gas boiler | August 2026 |
| NCB700-250/150 | 96% AFUE condensing gas boiler | August 2026 |
| NFB-175HNFB | 95% AFUE condensing gas boiler | March 2025 |
| NFB-200HNFB | 95% AFUE condensing gas boiler | November 2021 |
| NFB700-110 | 96% AFUE condensing gas boiler | August 2026 |
| NFB700-110F | 96% AFUE condensing gas boiler | September 2026 |
| NFB700-150 | 96% AFUE condensing gas boiler | August 2026 |
| NFB700-150F | 96% AFUE condensing gas boiler | September 2026 |
| NFB700-200 | 96% AFUE condensing gas boiler | August 2026 |
| NFB700-200F | 96% AFUE condensing gas boiler | September 2026 |
| NFC-250/175HNFC | 95% AFUE condensing gas boiler | November 2021 |
| NFC-250/200HNFC | 95% AFUE condensing gas boiler | November 2021 |
| NHB-055NHB | 95% AFUE condensing gas boiler | November 2021 |
| NHB-055H | 95% AFUE condensing gas boiler | February 2024 |
| NHB-080NHB | 95% AFUE condensing gas boiler | November 2021 |
| NHB-080H | 95% AFUE condensing gas boiler | February 2024 |
| NHB-110NHB | 95% AFUE condensing gas boiler | November 2021 |
| NHB-110H | 95% AFUE condensing gas boiler | February 2024 |
| NHB-150NHB | 95% AFUE condensing gas boiler | November 2021 |
| NHB-150H | 95% AFUE condensing gas boiler | February 2024 |