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The Navien NFC-250/200H, 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 + 4,000 sq ft and high-demand heating and hot water.
Installed by 4Most Energy — 199,000 BTU Heating • 210,000 BTU Hot Water
The Navien NFC-250/200H is the most powerful combi boiler in Navien’s lineup, built for large homes and high-demand heating systems that need superior performance and energy efficiency. Professionally installed and commissioned by 4Most Energy, this model combines powerful 199,000 BTU/h heating with 210,000 BTU/h domestic hot-water output to deliver exceptional comfort all year round.
With up to 95 % AFUE efficiency, a dual stainless-steel heat exchanger, and advanced condensing technology, the NFC-250/200H offers maximum reliability, lower fuel consumption, and whisper-quiet operation—making it ideal for Ontario homes facing cold winters and heavy daily usage.
Highest heating capacity (199 k BTU) for large or multi-zone homes
Endless hot water (210 k BTU) with steady performance at 10.8 GPM max / 8.5 GPM average
Dual stainless-steel heat exchanger for longevity and corrosion resistance
Smart modulating burner for efficient, consistent temperature control
Wi-Fi ready (NaviLink™) and ultra-low NOx emissions for eco-friendly operation
Compact wall-mount design saves space and simplifies installation
Ideal for large homes up to ≈ 4,000 sq ft with 4 bathrooms
Perfect for high-demand domestic hot-water systems and multi-zone heating
Compatible with in-floor heating, radiators, and air-handler systems
Great for homes with combined hydronic and forced-air setups or basement suites
