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The Navien NCB‑250/150H is a high‑performance condensing combi water boiler designed to deliver powerful hydronic heating and continuous domestic hot water from a single, ultra‑compact wall‑mounted unit. With 95% AFUE, a 150,000 BTU heating capacity, and an advanced 11:1 turndown ratio, this combi water boiler provides exceptional efficiency, comfort, and fuel savings for modern homes. It operates on natural gas or propane, making it ideal for a wide range of installations.
Key Features
High‑Efficiency Condensing Performance
95% AFUE for outstanding energy savings
150,000 BTU heating output for reliable whole‑home comfort
Stainless steel heat exchanger ensures long‑term durability and corrosion resistance
Combi System: Heat + Hot Water
Provides hydronic space heating and endless domestic hot water
Eliminates the need for a separate water heater
Ideal for homes looking to maximize efficiency and reduce equipment footprint
Advanced 11:1 Turndown Ratio
Wide modulation range for precise temperature control
Reduces cycling, improves comfort, and lowers fuel consumption
Fuel Flexibility
Compatible with natural gas or propane
Perfect for homes without natural gas service or those upgrading from older LP systems
Compact Wall‑Hung Design
Saves valuable floor space
Quiet operation suitable for closets, utility rooms, and tight mechanical spaces
Smart Navien Controls
Intuitive digital interface
Built‑in diagnostics and system monitoring
Compatible with modern heating controls and outdoor reset
Dimensions
Height: 27.4 in
Width: 17.3 in
Depth: 13.2 in
Ideal For
Homes needing both hydronic heat and domestic hot water
High‑efficiency upgrades and replacements
Natural gas or propane installations
Space‑restricted mechanical rooms
We service and install all types of HVAC heating and cooling equipment throughout Long Island, including (but not limited to) this coverage area:
Nassau County: Oyster Bay, Hempstead, North Hempstead, Glen Cove, Long Beach, Freeport, Valley Stream, Garden City, Great Neck, Mineola, Hicksville, Levittown, Massapequa, Bethpage, Plainview, Syosset, Jericho, Westbury, Rockville Centre, Farmingdale
Suffolk County: Huntington, Babylon, Islip, Smithtown, Brookhaven, Riverhead, Shelter Island, Southold, Southampton, East Hampton, Commack, Deer Park, Lindenhurst, Bay Shore, Brentwood, Central Islip, Hauppauge, Centereach, Selden, Medford, Patchogue, Shirley
Contact us today at (631) 779-3196
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