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NAVIEN Combi Boiler NCB-250/150H , 150,000 BTU Heating, 210,000 BTU Water Heating
Original price was: $8,990.00.$7,590.00Current price is: $7,590.00.
NAVIEN Combi Boiler NFC-250/175H , 175,000 BTU Heating, 250,000 BTU Water Heating
$4,864.00
Starting at:
The Navien NFC-250/175H, installed by 4Most Energy, is the most powerful combi boiler in Navien’s lineup, delivering 199,000 BTU heating and 210,000 BTU hot water with a 10.8 GPM max flow rate. Ideal for large homes up to 4,000 sq ft and high-demand heating and hot water.
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Navien NFC-250/175H Combi Boiler
Installed by 4Most Energy — 175,000 BTU Heating • 210,000 BTU Hot Water
The Navien NFC-250/175H is Navien’s most powerful residential condensing combi boiler, engineered to handle high-demand heating and hot-water applications in large homes or light-commercial spaces. Professionally installed and serviced by 4Most Energy, this unit provides unbeatable comfort, efficiency, and performance in one compact wall-mounted system.
Delivering up to 175,000 BTU/h of heating and 210,000 BTU/h for domestic hot water, the NFC-250/175H combines Navien’s premium stainless-steel heat exchanger, smart modulation, and advanced condensing technology to achieve an exceptional 95 % AFUE efficiency. It’s built to handle the toughest Ontario winters while maintaining consistent water temperature for multiple fixtures at once.
Why Choose the NFC-250/175H with 4Most Energy
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High output for large and multi-zone homes — dependable heating up to 175 k BTU.
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Endless hot water with 210 k BTU capacity and steady flow (up to 10.8 GPM).
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Stainless-steel heat exchanger ensures long-term reliability & corrosion resistance.
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Smart modulating burner adapts automatically to demand, saving energy.
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Wi-Fi ready (NaviLink™) + digital controls for easy remote monitoring.
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Ultra-low NOx emissions for a cleaner, eco-friendly operation.
Best Fit ( Size & Applications )
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Ideal for large homes, duplexes, or light-commercial spaces up to ≈ 4,500 sq ft.
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Supports up to 4 bathrooms with simultaneous hot-water usage.
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Excellent for multi-zone radiant heating, radiators, air handlers, and mixed hydronic systems.
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Handles high-heat-load buildings, basement suites, or add-on units with ease.
Additional Information
Additional Information
| Model | NFC-250/175H | Brand | Navien | Series | NFC-H |
|---|---|---|---|---|---|
| Heating Capacity | 175,000 BTU | Water Heating Capacity | 210,000 BTU | Energy Factor | 95 % |
| Flow Rate (Max) | 10.8 GPM | Flow Rate (Average) | 8.5 GPM | Wi-Fi Capable | YES |
| Venting Type | Direct Vent | Built-In Recirculation | YES | Energy Star | YES |
| Product Depth | 13.2" | Product Width | 17.3" | Product Height | 28" |
| Weight | 90 lbs | Warranty – Heat Exchanger | 10 Years | Warranty – Parts | 5 Years |
| Labour Warranty (4Most Energy) | 1 Year — Professional Installation by Certified 4Most Energy Technicians | ||||
Service Area
4Most Energy proudly serves homeowners and businesses throughout the Greater Toronto Area, Golden Horseshoe, and Southwestern Ontario with professional installation and service for Navien tankless water heaters and boilers.
We offer expert sales, installation, and maintenance for all Navien high-efficiency systems in:
Toronto • North York • Richmond Hill • Vaughan • Markham • Aurora • Newmarket • Mississauga • Oakville • Burlington • Brampton • Hamilton • St. Catharines • Niagara Falls • Kitchener • Waterloo • Guelph • Cambridge • Milton • Orangeville • Barrie • Oshawa • Whitby • Ajax • Pickering • Stoney Creek • Grimsby, and all surrounding communities.
Our certified HVAC team provides on-site installation and replacement services across these regions. Every Navien installation by 4Most Energy includes a 1-year labour warranty, ensuring peace of mind and guaranteed workmanship.
With licensed technicians strategically located throughout Ontario, we offer fast response times for after-installation service, emergency repairs, and priority maintenance calls, keeping your Navien tankless water heater or boiler running efficiently year-round.
Sizing Table
System Size & Capacity
The Navien NFC-250/175H is engineered for
large homes, multi-suite buildings, or light-commercial spaces up to ~4,500 sq ft
with 5 or more bathrooms and high hot-water demand.
Heating Output: 175,000 BTU/h |
Domestic Hot-Water Output: 210,000 BTU/h |
Flow Rate: Max 10.8 GPM / Avg 8.5 GPM
Ideal for multiple hydronic heating zones, including
in-floor radiant loops, radiators, and
air-handler systems.
Provides stable temperature control for high-demand domestic and heating loads.
⚙️ Installed and commissioned by 4Most Energy with expert zoning,
sizing guidance, and priority after-installation service across Ontario.
