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Navien Condensing Gas Boiler (NHB)

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NHB series

Max Input : 55,000 - 150,000 BTU/H
Indoor Only
Residential / Commercial

  • Super condensing efficiency
  • Dual stainless steel heat exchangers
  • SCH40, 2” PVC venting up to 60’
  • ½” Gas pipe up to 24’
  • TDR up to 15:1
  • integrated controls
  • 2"PVC, CPVS, Polypropylene venting up to 60'

    Low exhaust gas temperature allows PVC, CPVC, and Polypropylene vent systems, significantly reducing installation costs.
    2" venting option allows for a flue to be pulled through the existing vent. No additional holes need to be drilled for venting.
    3" vents can be used to 150' with standard 2" X 3" adapters.

  • Better Adaptability to Gas Systems

    The Negative Pressure Gas Valve and Fan with Dual Venturi operation allows for better adaptability to low gas pressure applications. This industry leading technology makes it possible for the NHB to be installed with 1/2" Gas Lines up to24'.
    Easy residential tank replacements.

  • Field Convertible

    With the Negative Pressure Gas Valve and the Dual Venturi system, the NHB allows for easy field convertibility from NG to LP.

  • Ease of Installation

    With our mounting and bracket system we make it easy for only one person to complete the whole installation

  • Modular Design for Durability & Reliability

    Improved durability and reliability with the use of high quality engineering plastic(PPS) and reliable parts.
    Simple modular design for water path minimizes water pressure drop.
    The improved water way design allows for easier maintenance and service to be performed in the field.

  • Hydronic Heating Benefits

    Clean / Silent / Comfort / Economical

  • Extended Life, Stainless Steel Heat Exchanger

    Stainless steel for the Boiler’s integrated primary and secondary heat exchangers prevents corrosion and ensures a longer lifespan over copper heat exchangers. Stainless steel components also maintain consistency, even during long periods of use, and aid in efficiency by caputuring as much condensation as possible.

  • Eco-friendly, Premixed Burner

    The Eco-Premixed Burner generates at least 20% less CO2 and about 75% less harmful air pollutants such as NOX than other conventional boilers.

  • Weather Compensation Heating, K-Factor Heating

    An outdoor sensor can be connected to Navien’s Condensing Boiler. With this device the unit can automatically regulate the heating temperature according to changes in the temperature outdoors, allowing for precise indoor heat regardless of the weather

  • Powerful Anti-Freeze Feature

    The Boiler's built-in Control System is designed to keep the unit's plumbing frost free in winter conditions.