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Home | Shop By Brand | Navien Tankless Water Heaters | Navien NCB-210E High Efficiency Condensing Gas Combi-Boiler Tankless Water Heater

Navien NCB-210E High Efficiency Condensing Gas Combi-Boiler Tankless Water Heater

Item # NCB-210E
Regular Retail:$2,749.00
Sale Price:$2,599.00Save: $150.00 (5%)
Usually ships in 3-4 business days
Since 2006, Navien, Inc. has become one of the fastest growing companies in the home comfort sector in North America and is now a leader in condensing technology, providing condensing tankless water heaters, combi-boilers, and boilers.* Navien's products possess state-of-the-art technology, high efficiency and reliable quality.

Navien has achieved international recognition for its sophisticated engineering and robust designs. Backed by parent company, KD Navien with more than thirty-five years of experience with advanced boiler and water heating technology, Navien will continue its mission to provide high quality products.


Super condensing efficiency

  • Dual stainless steel heat exchangers
  • SCH40, 2" PVC venting up to 60'
  • " Gas pipe up to 24'
  • Automatic water filling system
  • integrated controls

    Ultra Condensing Efficiency

  • Navien's Condensing Technology offers the high efficiency.
  • Money and energy savings over tank type water heaters and traditional water heaters.

    Two Stainless Steel Heat Exchangers

  • Provides longer life expectancy as they are highly resistant to corrosion and erosion compared to copper heat exchangers.
  • Reduces minerals deposits.

    Low NOx Emissions (20ppm)

  • New metal fiber burner is designed to deliver a consistent air/gas mixture improving combustion efficiency.
  • Result in less acid rain and less green house effect.
  • Comply with SCAQMD 1146.2 strict NOx emissions standard.

    2" PVC, CPVC, Polyprophylene Venting Up To 60'

  • 2" venting option allows for a flue to be pulled through the existing vent.
  • 3" vents can be used up to 150' with standard 2" x 3" adapters.

    Utilizes Existing 1/2" Gas Line

  • The negative pressure gas valve and fan with dual venturi operation allows for better adaptability to low gas pressure applications.
  • Makes it possible for the NPE to be installed " gas lines up to 24'.

    Field Convertible

  • NCB models allow for easy convertibility from NG to LP.

    Where Technology Meets Ecology, Combination Boiler

  • The ideal solution for customers who need both domestic hot water and a space heating application.
  • Heats water when needed, making it environmentally sound as well as cost efficient.

    Hydronic Heating Benefits

  • Clean: little chance to cause dust or lower humidity because there is no air movement.
  • Silent: offers silent heating because no blowers are needed for forced circulation.
  • Comfort: keeps floors warm but indoor air fresh, making people feel warm and comfortable.
  • Coverage: radiant heat makes heating from floor to ceiling possible.
  • Economical: radiant heat in the floors can transmit warmth throughout the house hours after turning off the heater.

    Automatic Water Filling System

  • Automatically fills water into space heating pipes when the unit senses a water shortage.

    Powerful Anti-Freeze Feature

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

  • Gas Input
  • Space Heating: 18,000100,000 BTU/H
  • Domestic Hot Water: 18,000180,000 BTU/H
  • AFUE: 95.0%
  • Flow Rate (DHW)
  • 77F (43C) Temp Rise: 4.0 GPM (15.1 L/m)
  • Dimensions: 17"(W) x 28"(H) x 12"(D)
  • Weight: 84 lbs (38kg)
  • Installation Type: Indoor wall-hung
  • Venting Type: Forced draft direct vent
  • Ignition: Electronic ignition
  • Water Pressure (Hydronic/DHW): 1230 PSI /15150 PSI
  • Natural Gas Supply Pressure (from source): 3.5" 10.5" WC
  • Propane Gas Supply Pressure (from source): 8.0" 13.5" WC
  • Natural Gas Manifold Pressure (min to max): -0.05" WC / -0.36" WC
  • Propane Gas Manifold Pressure (min to max): -0.10" WC / -0.66" WC
  • Minimum Flow Rate (DHW): 0.5 GPM (1.9 L/m)

    Connection Sizes

  • Heating Supply/Return: 1" NPT
  • DHW Inlet/Outlet: 3/4" NPT
  • Gas Inlet: 3/4" NPT
  • Auto Feeder: 1/2" NPT
  • Condensate Outlet: 1/2" NPT

    Power Supply

  • Main Supply: 120V AC, 60Hz
  • Maximum Power Consumption: 200W (up to 2 amperes)


  • Casing: Cold rolled carbon steel
  • Heat Exchangers: Primary/secondary heat exchanger: stainless steel DHW heat exchanger: stainless steel


  • Exhaust: 2" or 3" PVC, CPVC, approved polypropylene 2" or 3" special gas vent type BH (Class II, A/B/C)
  • Intake: 2" or 3" PVC, CPVC, polypropylene 2" or 3" special gas vent type BH (Class II, A/B/C)
  • Vent Clearances: 0" to combustibles

    Safety Devices

  • Flame rod, APS, gas valve operation detector,ignition operation detector, water temperature high limit switch, exhaust temperature high limit sensor
    • "Our experience with this company was extremely good. The product we bought is good quality and the service we got was very helpful. The product arrived in a timely manner and all our questions were answered. We would do business with this company again. ... read more

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      - Steve Hellums, Odon, IN

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      - The Washer and Dryer are installed and operating beautifully. Thanks again for your assistance. You have a satisfied customer that appreciates the courteous attention provided. Sincerely,Bruce"

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