Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The NCB-190/060H and NCB-190/080H are the two smallest NCB-H combis and are twins below the maximum: both fire down to 11 MBH, weigh 87 lb in the same 17.3 x 29.3 x 12.8 in cabinet, draw up to 160,000 BTU/h for DHW and are rated 95.0% AFUE. The 080H adds 20 MBH of heating ceiling (80 versus 60 MBH), so a heat-loss calculation decides which one the home needs.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Navien NCB-190/060H | Navien NCB-190/080H |
|---|---|---|
| Heating input, minimum | 11 MBH | 11 MBH |
| Heating input, maximum | 60 MBH | 80 MBH |
| DHW input, maximum | 160 MBH | 160 MBH |
| Efficiency (AFUE) | 95 % | 95 % |
| Weight | 87 lb | 87 lb |
| Max. equivalent vent length, 2" | 65 ft | 65 ft |
| Max. equivalent vent length, 3" | 150 ft | 150 ft |
| Domestic hot water | Integrated in the combi heat exchanger | Integrated in the combi heat exchanger |
Both models are the same physical unit: an 87 lb wall-hung combi in the 17.3 x 29.3 x 12.8 in NCB-H cabinet, rated 95.0% AFUE, with Navien's dual stainless steel heat exchanger arrangement and a built-in DHW module that fires up to 160,000 BTU/h.
Minimum fire is identical at 11 MBH, so in a low-load home the two boilers behave the same during mild weather. The only published difference is the heating ceiling: 60 MBH on the 060H against 80 MBH on the 080H.
Venting and connections match exactly — 2" to 65 equivalent feet or 3" to 150, 1" NPT heating connections and a 3/4" NPT gas connection. The choice therefore reduces to the room-by-room heat-loss calculation: if the load never approaches 60 MBH the smaller model is sufficient, and if it does the 080H provides headroom with no footprint penalty.
Navien
The Navien NCB-190/060H is the smallest NCB-H combi: 11 to 60 MBH space-heating input with DHW input to 160,000 BTU/h in one wall-hung condensing appliance, rated 95.0% AFUE and weighing 87 lb.
Navien
The Navien NCB-190/080H steps the NCB-H combi up to 11 to 80 MBH heating input with the same 160,000 BTU/h DHW input as the 060H, rated 95.0% AFUE in the identical 87 lb cabinet.
Yes. Both weigh 87 lb and measure 17.3 x 29.3 x 12.8 in, with the same 11 MBH minimum fire and the same 160,000 BTU/h DHW input.
When the heat-loss calculation shows the home needs more than the 060H's 60 MBH heating ceiling on a design day. Extra ceiling without a matching load is not an advantage.
Yes. Both are NCB-H combis: domestic hot water is produced on demand in the built-in DHW module, so no separate tank is needed.
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 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.