Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
Navien NCB-180E and Navien NCB-210E are two combination (combi) boilers from the Navien NCB-E Combi (previous generation) line. The Navien NCB-180E is documented at 14–80 MBH input, 75 MBH heating capacity and 95% AFUE, while the Navien NCB-210E is documented at 18–100 MBH input, 94 MBH heating capacity and 95% AFUE. Navien NCB-210E lists 20 MBH more input than Navien NCB-180E (100 MBH against 80 MBH). Both list the same published AFUE of 95%. Navien NCB-210E lists 10 lb more shipping weight than Navien NCB-180E (84 lb against 74 lb).
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Navien NCB-180E | Navien NCB-210E |
|---|---|---|
| Heating input, minimum | 14 MBH | 18 MBH |
| Heating input, maximum | 80 MBH | 100 MBH |
| Heating capacity | 75 MBH | 94 MBH |
| Efficiency (AFUE) | 95 % | 95 % |
| DHW input, minimum | 14 MBH | 18 MBH |
| DHW input, maximum | 150 MBH | 180 MBH |
| Weight | 74 lb | 84 lb |
| Height | 28 in | 28 in |
| Width | 17 in | 17 in |
| Depth | 12 in | 12 in |
| Venting | 2" or 3" PVC, CPVC, polypropylene; 2" or 3" special gas vent Type BH (Class III A/B/C) | 2" or 3" PVC, CPVC, polypropylene; 2" or 3" special gas vent Type BH (Class III A/B/C) |
| Heating connections | 1" NPT | 1" NPT |
| Gas connection | 3/4" NPT | 3/4" NPT |
| Fuel | Natural gas or propane | Natural gas or propane |
| Net AHRI water rating | 65 MBH | 82 MBH |
| DHW flow rate at 77°F (43°C) rise | 3.4 GPM | 4 GPM |
| Hydronic water pressure | 12 – 30 psi | 12 – 30 psi |
| DHW connections | 3/4" NPT | 3/4" NPT |
Published ratings: the Navien NCB-180E is rated 14–80 MBH input, 75 MBH heating capacity and 95% AFUE; the Navien NCB-210E is rated 18–100 MBH input, 94 MBH heating capacity and 95% AFUE. Navien NCB-210E lists 20 MBH more input than Navien NCB-180E (100 MBH against 80 MBH). Both list the same published AFUE of 95%.
Navien NCB-210E lists 10 lb more shipping weight than Navien NCB-180E (84 lb against 74 lb). The domestic-hot-water input differs: the Navien NCB-180E lists 14 MBH, while the Navien NCB-210E lists 18 MBH. The domestic-hot-water input differs: the Navien NCB-180E lists 150 MBH, while the Navien NCB-210E lists 180 MBH. The dhw flow rate at 77°F rise differs: the Navien NCB-180E lists 3.4 GPM, while the Navien NCB-210E lists 4 GPM.
Both records print the same AFUE (95%), height (28 in), width (17 in) and depth (12 in), per the cited sources.
Navien
The Navien NCB-180E is a previous-generation wall-hung condensing combi from the discontinued NCB-E series: 14 to 80 MBH heating input, 75 MBH capacity at 95.0% AFUE, and DHW input to 150,000 BTU/h.
Navien
The Navien NCB-210E is a previous-generation wall-hung condensing combi from the discontinued NCB-E series: 18 to 100 MBH heating input, 94 MBH capacity at 95.0% AFUE, and DHW input to 180,000 BTU/h.
The Navien NCB-210E lists 100 MBH, against 80 MBH on the Navien NCB-180E, per the cited documentation.
Both list the same AFUE of 95%.
It ships at 84 lb against 74 lb for the Navien NCB-180E, per the cited sources.
A consultation includes a heat-loss review so the size is right the first time.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.