Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Navien Inc. is the Korean manufacturer behind the Navien condensing boiler and combi-boiler lines sold in Canada through navieninc.ca. Its current Canadian residential line-up covers the NCB-H and NFC-H combis plus the NFB-H and NHB-H heating-only boilers, all condensing stainless-steel or fire-tube designs.
At a glance
Where ROMA provides on-site service
On-site service is currently offered in Greater Vancouver, BC, including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Coquitlam, Port Moody, Delta, Langley, Maple Ridge, Abbotsford, Chilliwack, White Rock, Pitt Meadows, Tsawwassen, Anmore, Lions Bay, Belcarra, Bowen Island, Mission. Everything else on this site is reference information you can use anywhere in Canada.
Navien Inc. is part of the Kyung Dong Navien group, a Korean manufacturer, and markets its Canadian residential products through navieninc.ca. The boilers documented on Boilers.ca are all condensing designs: the NCB-H and NFC-H combine space heating with built-in domestic hot water, while the NFB-H and NHB-H are heating-only boilers that work with a separate tank for hot water.
Navien Canada's current residential boiler and combi line-up consists of the NCB-H condensing combi (five models), the NFC-H fire-tube condensing combi (two models), the NFB-H condensing boiler (two models) and the NHB-H compact condensing boiler (four models). The earlier NCB (180/210/240), NFC, NFB and NCB-E generations are listed as discontinued on the Canadian site, and the legacy downloads for those generations remain publicly hosted.
The Navien controls display E0xx-style error codes, and Boilers.ca documents those codes against the manual for the correct generation because the same numeric code can mean different things across generations. Models like the NCB-E and the newer NCB-H share many code numerals, but each control's code table must be read from its own generation's manual; the same numeral can even differ in meaning between current series.
Series
Each series hub lists its models, verified specifications, manuals and documented alerts.
The NCB-H is Navien's current wall-hung condensing combi series for Canada: five models from NCB-190/060H to NCB-250/150H that fire up to 150 MBH for space heating, each with a dual stainless steel heat exchanger and a built-in DHW module for on-demand domestic hot water.
The NFC-H is Navien's fire-tube condensing combi series for Canada: the NFC-250/175H and NFC-250/200H, rated 95.0% AFUE, with a stainless steel fire-tube heat exchanger and DHW flow published at 7.9 GPM on a 45°F rise.
The NFB-H is Navien's heating-only condensing boiler series for Canada: the NFB-175H and NFB-200H, rated 95.0% AFUE, designed to work with an external tank for domestic hot water and carrying no DHW error codes because hot water is not produced inside the unit.
The NHB-H is Navien's compact wall-hung condensing boiler series for Canada: four models from NHB-55H to NHB-150H firing as low as 8,000 BTU/h and rated 95.0% AFUE, in a cabinet that stands only 23.8 in tall for tight mechanical rooms.
The NFB-C is Navien's wall-hung commercial fire-tube condensing boiler series for Canada: the NFB-301C and NFB-399C fire from 20 and 26 MBH up to 301 and 399 MBH at a printed 97.5% thermal efficiency, with 15:1 turndown, 3" or 4" venting and cascade control for up to 32 units.
The NFB700-C is Navien's floor-standing commercial condensing fire-tube boiler series for Canada — its first floor-standing line — with the NFB700-500C, 600C, 800C and 1000C firing from 40 to 999 MBH at a printed 97.5% thermal efficiency, up to 15:1 turndown and a 160 PSI working pressure rating.
The NCB-E was Navien's previous-generation condensing combi series — NCB-150E, 180E, 210E and 240E — now listed as discontinued on navieninc.ca's discontinued-products page. Its service manual, Ver 1.4 (Oct 2015), remains publicly hosted for owners diagnosing E0xx codes.
The NCB (first generation) was Navien's original combi-boiler line — the NCB-180, NCB-210 and NCB-240 — listed as Discontinued on both navieninc.ca and navieninc.com, with official model pages on both sites still hosting the NCB manuals.
The NFC (first generation) was Navien's fire-tube combi-boiler line — the NFC-175 and NFC-200 — listed as Discontinued on both navieninc.ca and navieninc.com, with official model pages on both sites still hosting the NFC manuals.
The NFB (first generation) was Navien's fire-tube boiler line — the NFB-175 and NFB-200 — listed as Discontinued on both navieninc.ca and navieninc.com, with official model pages on both sites still hosting the NFB manuals.
The NPE-A2 is Navien's premium condensing tankless water heater line for Canada — NPE-180A2, NPE-210A2 and NPE-240A2 — each with the patented ComfortFlow buffer-tank and recirculation system, rated 0.95 UEF and firing from 10,000–13,300 BTU/h up to 150,000–199,900 BTU/h. It is a water heater, not a boiler.
The NPE-S2 is Navien's standard condensing tankless water heater line for Canada — NPE-150S2, 180S2, 210S2 and 240S2 — rated 0.93–0.96 UEF with inputs from 18,000–120,000 up to 13,300–199,900 BTU/h. It is a DHW-only water heater, not a boiler.
The NPN-U is Navien's non-condensing (Premium Non-condensing) tankless water heater series in 160,000, 180,000 and 199,900 BTU/h models — the first non-condensing tankless line to use Navien's stainless-steel NaviTech heat exchanger and burner, rated 0.81 UEF and usable indoors or outdoors in the same unit. It is a water heater, not a boiler.
The NPN-E is the exterior half of Navien's non-condensing NPN tankless water heater line — NPN-160E, NPN-180E and NPN-199E, rated 0.81 UEF with the same 10,700 BTU/h minimum fire and 55–60 lb cabinet as the universal NPN-U. It is a DHW-only water heater, not a boiler.
Models
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.
Navien
The Navien NCB-240/110H heats from 13 to 110 MBH input with DHW input from 13,300 to 199,900 BTU/h, rated 95.0% AFUE in the 96 lb NCB-H cabinet — the size most often matched to a detached home.
Navien
The Navien NCB-240/130H is the 240-class NCB-H combi with 13 to 130 MBH heating input, DHW input to 199,900 BTU/h, 95.0% AFUE and a 96 lb cabinet — headroom for larger homes with radiators or in-floor heat.
Navien
The Navien NCB-250/150H is the largest NCB-H combi: 14 to 150 MBH heating input with DHW input from 14,000 to 210,000 BTU/h, rated 95.0% AFUE in the same 96 lb, 17.3-inch-wide cabinet as the 240-class models.
Navien
The Navien NFC-250/175H is the smaller NFC-H fire-tube combi: 13.3 to 175 MBH heating input, DHW input to 210,000 BTU/h, 7.9 GPM at a 45°F rise and 95.0% AFUE in a 141 lb stainless steel fire-tube cabinet.
Navien
The Navien NFC-250/200H is the top NFC-H fire-tube combi: 13.3 to 199.9 MBH heating input with DHW input to 210,000 BTU/h, 95.0% AFUE and 7.9 GPM DHW flow at a 45°F rise, in the same 141 lb cabinet as the 175H.
Navien
The Navien NFB-175H is a heating-only condensing boiler firing 13.3 to 175 MBH at 95.0% AFUE, with 1 1/4" NPT heating connections and no integrated hot-water production — hot water comes from an external tank.
Navien
The Navien NFB-200H is the largest NFB-H heating-only boiler: 13.3 to 199.9 MBH of input at 95.0% AFUE with 15:1 turndown per the quick facts, sharing the 121 lb cabinet and 1 1/4" NPT connections of the NFB-175H.
Navien
The Navien NHB-55H is the smallest NHB-H compact boiler: 8 to 55 MBH of input at 95.0% AFUE in a 17.3 x 12.8 x 23.8 in, 73 lb cabinet — built for low-load homes and tight mechanical rooms.
Navien
The Navien NHB-80H is the 80 MBH member of the compact NHB-H series: 8 to 80 MBH input at 95.0% AFUE, keeping the 8 MBH minimum fire and the 73 lb, 23.8-inch-tall cabinet of the NHB-55H.
Navien
The Navien NHB-110H is the 110 MBH compact boiler of the NHB-H series: 10 to 110 MBH input at 95.0% AFUE with 11:1 turndown per the quick facts, stepping up to 80 lb in the same short cabinet.
Navien
The Navien NHB-150H is the largest NHB-H compact boiler: 10 to 150 MBH input at 95.0% AFUE with 15:1 turndown per the quick facts, delivering the most heating of any 23.8-inch-tall boiler in the series.
Navien
The Navien NFB-301C is the entry model of the wall-hung NFB-C commercial boiler series: 20 to 301 MBH of input with a 293 MBH heating capacity and a 255 MBH net AHRI water rating at 97.5% thermal efficiency, weighing 243 lb empty (307 lb with water).
Navien
The Navien NFB-399C is the top model of the wall-hung NFB-C commercial boiler series: 26 to 399 MBH of input with a 389 MBH heating capacity and a 338 MBH net AHRI water rating at 97.5% thermal efficiency, in the same cabinet as the NFB-301C at 278 lb.
Navien
The Navien NFB700-500C is the entry model of the floor-standing NFB700-C commercial boiler series: 40 to 499 MBH of input with a 487 MBH heating capacity and a 423 MBH net AHRI water rating at 97.5% thermal efficiency.
Navien
The Navien NFB700-600C steps the floor-standing NFB700-C line to 40 to 599 MBH of input with a 584 MBH heating capacity and a 508 MBH net AHRI water rating at 97.5% thermal efficiency, in the same 622 lb cabinet as the 500C.
Navien
The Navien NFB700-800C is the third size of the floor-standing NFB700-C commercial boiler series: 66 to 799 MBH of input with a 779 MBH heating capacity and a 677 MBH net AHRI water rating at 97.5% thermal efficiency, in the larger 750 lb cabinet.
Navien
The Navien NFB700-1000C is the top model of the floor-standing NFB700-C commercial boiler series: 66 to 999 MBH of input with a 974 MBH heating capacity at 97.5% thermal efficiency, in the same 750 lb cabinet as the 800C.
Navien
The Navien NCB-180 is a first-generation wall-hung condensing combi from the discontinued NCB series: 14 to 80 MBH of heating input with 74 MBH heating capacity, 93.5% AFUE and DHW input to 150,000 BTU/h.
Navien
The Navien NCB-210 is a first-generation wall-hung condensing combi from the discontinued NCB series: 18 to 100 MBH of heating input with 92 MBH heating capacity, 93.6% AFUE and DHW input to 180,000 BTU/h.
Navien
The Navien NCB-240 is a first-generation wall-hung condensing combi from the discontinued NCB series: 18 to 120 MBH of heating input with 109 MBH heating capacity, 93.3% AFUE and DHW input to 199,900 BTU/h.
Navien
The Navien NCB-150E is a previous-generation wall-hung condensing combi from the discontinued NCB-E series: 12 to 60 MBH heating input, 56 MBH capacity at 95.0% AFUE, and DHW input to 120,000 BTU/h.
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.
Navien
The Navien NCB-240E is a previous-generation wall-hung condensing combi from the discontinued NCB-E series: 18 to 120 MBH heating input, 112 MBH capacity at 95.0% AFUE, and DHW input to 199,900 BTU/h.
Navien
The Navien NFC-175 is a first-generation fire-tube condensing combi from the discontinued NFC series: 18 to 175 MBH heating input with 161 MBH capacity at 95.0% AFUE and DHW input to 199,900 BTU/h.
Navien
The Navien NFC-200 is a first-generation fire-tube condensing combi from the discontinued NFC series: 18 to 199 MBH heating input with 183 MBH capacity at 95.0% AFUE and DHW input to 199,900 BTU/h.
Navien
The Navien NFB-175 is a first-generation fire-tube condensing boiler from the discontinued NFB series: 17.5 to 175 MBH heating input, 161 MBH capacity, a 140 MBH net AHRI water rating and 95.0% AFUE, heating-only.
Navien
The Navien NFB-200 is a first-generation fire-tube condensing boiler from the discontinued NFB series: 19.9 to 199 MBH heating input, 183 MBH capacity, a 159 MBH net AHRI water rating and 95.0% AFUE, heating-only.
Navien
The Navien NPE-180A2 is a condensing tankless water heater — a DHW-only appliance, not a boiler — firing 10,000 to 150,000 BTU/h at 0.95 UEF with up to 8.4 GPM at a 35°F rise.
Navien
The Navien NPE-210A2 is a condensing tankless water heater — a DHW-only appliance, not a boiler — firing 12,000 to 180,000 BTU/h at 0.95 UEF with up to 10.1 GPM at a 35°F rise.
Navien
The Navien NPE-240A2 is a condensing tankless water heater — a DHW-only appliance, not a boiler — firing 13,300 to 199,900 BTU/h at 0.95 UEF with up to 11.2 GPM at a 35°F rise.
Navien
The Navien NPE-150S2 is a condensing tankless water heater — a DHW-only appliance, not a boiler — firing 18,000 to 120,000 BTU/h at 0.93 UEF with up to 6.8 GPM at a 35°F rise.
Navien
The Navien NPE-180S2 is a condensing tankless water heater — a DHW-only appliance, not a boiler — firing 10,000 to 150,000 BTU/h at 0.96 UEF with up to 8.4 GPM at a 35°F rise.
Navien
The Navien NPE-210S2 is a condensing tankless water heater — a DHW-only appliance, not a boiler — firing 12,000 to 180,000 BTU/h at 0.96 UEF with up to 10.1 GPM at a 35°F rise.
Navien
The Navien NPE-240S2 is a condensing tankless water heater — a DHW-only appliance, not a boiler — firing 13,300 to 199,900 BTU/h at 0.96 UEF with up to 11.2 GPM at a 35°F rise.
Navien
The Navien NPN-160U is a non-condensing tankless water heater — a DHW-only appliance, not a boiler — firing 10,700 to 160,000 BTU/h at 0.81 UEF with up to 7.6 GPM at a 35°F rise.
Navien
The Navien NPN-180U is a non-condensing tankless water heater — a DHW-only appliance, not a boiler — firing 10,700 to 180,000 BTU/h at 0.81 UEF with up to 8.5 GPM at a 35°F rise.
Navien
The Navien NPN-199U is a non-condensing tankless water heater — a DHW-only appliance, not a boiler — firing 10,700 to 199,900 BTU/h at 0.81 UEF with up to 9.5 GPM at a 35°F rise.
Navien
The Navien NPN-160E is a non-condensing tankless water heater — a DHW-only appliance, not a boiler — firing 10,700 to 160,000 BTU/h at 0.81 UEF with up to 7.6 GPM at a 35°F rise.
Navien
The Navien NPN-180E is a non-condensing tankless water heater — a DHW-only appliance, not a boiler — firing 10,700 to 180,000 BTU/h at 0.81 UEF with up to 8.5 GPM at a 35°F rise.
Navien
The Navien NPN-199E is a non-condensing tankless water heater — a DHW-only appliance, not a boiler — firing 10,700 to 199,900 BTU/h at 0.81 UEF with up to 9.5 GPM at a 35°F rise.
Services
On-site service in Greater Vancouver. Brand and model context is kept when you request service.
Error codes and alerts
Documented meanings resolved against the specific series, controller and manual version. A code is not a diagnosis.
Manuals and documents
Links go to the manufacturer's own documents. Boilers.ca does not reproduce manuals.
No. A numeric code such as E046 can carry one definition in one Navien manual and another in a different series or generation, and thresholds can vary too. Always read the code against the manual for the unit's own model and generation before acting on it; Boilers.ca documents each code set separately.
The NCB-H and NFC-H combis produce domestic hot water on demand from the same appliance, which suits homes without a tank. The NFB-H and NHB-H are heating-only boilers, so domestic hot water comes from a separate tank or appliance. A heat-loss calculation and the household's hot-water demand decide which arrangement fits.
ROMA Heating & Cooling installs and services gas boilers across Greater Vancouver. Whether a specific Navien model is supplied for your project is confirmed at consultation; Boilers.ca does not claim stock or availability for any brand.
Describe what the boiler is doing and get a straight answer about the next step.
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.