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Residential Condensing Boilers

High Efficiency

Navien high efficiency condensing boilers provide whole house heating for small and large homes

Residential boilers from Navien save space and energy.

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NHB-H Series

Navien NHB-H boilers offer homeowners industry-leading turndown ratios, longer venting and cascading capabilities for greater installation flexibility, and easy-to-use integrated controls

  • Four sizes to meet a range of applications
  • Up to 15:1 turndown ratio
  • Zoning control built-in
  • Cascade up to 16 units

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NHB Series

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NFB-H Series

The NFB-H fire tube condensing boiler offers the same advantages of the NHB-H plus higher heating capacities.

• Four sizes to meet a range of applications

• Up to 15:1 turndown ratio

• Zoning control built-in

• Expandable via cascading technology

Lear More about the
NFB-H Series

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A new energy-efficient take on an old-fashioned system

All Navien new NHB-H and NFB-H boilers have Navien’s advanced burner system. The industry-leading turn down ratios maximize heating and energy efficiencies.

  • More energy-efficient than
    old fashioned boiler systems
  • Highest efficiency  —  95% AFUE
  • Energy Star certified
  • Backed by the industry’s strongest warranty — 15 years on heat exchangers
  • Elegant, clean appearance
  • Ideal for replacements or new construction
  • Takes up about 80% less space than traditional floor standing boilers
  • Easy to use control panel


Conventional Boilers Lose Heat
Condensing Boilers Retain It

Save space and energy while reducing greenhouse gasses with Navien high efficiency condensing boilers. Low exhaust gas temperatures allow for more cost-efficient venting, and flexible installation options for most homes.

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    Saves Energy, Good for Environment

    The condensing technology in the stainless steel heat exchangers of the NFB-H and NHB-H boilers saves energy, reduces green house gasses and resists corrosion.

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    Small Footprint

    Both the NFB-H Series and NHB-H Series boilers have a sleek wall‑hung design using less space than traditional floor standing boilers.

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    Control from Your Phone

    Optional NaviLink™ Wi-Fi control system gives you access to your NHB and NFB-H boiler from anywhere in the world

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    Low Cost Installation

    Low exhaust gas temperatures allow the use of PVC, CPVC, ULC S363, PP, and SS reducing installation time and costs. The system can use 2" venting for up to 65', or up to 150' with 3" venting

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    Capable of heating a separate indirect water heater

    To meet all the home’s domestic hot water needs.

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    Precise Temperature Adjustment

    Turndown ratio up to 15:1 – The sophisticated gas flow control system provides a high turn down ratio which reduces energy waste and excessive boiler cycling while also enhancing temperature control for DHW.


Explore Navien Boilers Applications

Space saving design occupies up to 80% less space than a traditional floor standing boilers.

  • Radiators
  • Hydronic finned tube baseboard
  • Radiant floor heating systems
  • Hydronic fan coils

Protect the Environment as You Heat Your Home

Navien condensing stainless steel heat exchangers recover extra heat that would be lost in non-condensing boilers to reduce energy consumption and CO₂ emissions and lowers exhaust temperatures.

Low exhaust temperatures allow the use of less expensive PVC vent piping.

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