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Navien Condensing Tankless Gas Water Heater (NR)

model img ENLARGE

NR series

Max Input : 150,000 – 199,900 BTU/H
Indoor/Outdoor Installation
NR Series for Residential

  • Ultra condensing efficiency
  • Dual stainless steel heat exchangers
  • Low NOx emissions (≤20ppm)
  • SCH 40, 3” PVC venting up to 100’
  • Cascading capable
  • Built-in Recirculation System ("A" model)
  • Remote controlled included
  • Navien's Annual Savings

    Navien’s Annual Savings

    Ultra Condensing Efficiency

    Navien’s condensing efficiency boasts one of the industries highest ratings
    of 0.96 D.O.E. energy factor. Customers can take advantage of the low annual
    operating costs and receive the best value and payback, compared with
    conventional tankless or tank-type water heaters.
    *Based on DOE operating cost and AGA Sept/07 Natural gas price


  • Stainless Steel Heat Exchanger

    Stainless Steel Heat Exchanger

    Extended Lifecycle

    Navien utilizes dual stainless steel heat exchangers, providing a longer life-
    expectancy and more resistance to erosion than copper heat exchangers used
    in other water heaters. Navien’s stainless steel heat exchangers operate with
    relatively low water temperatures, minimizing damage from hard water
    conditions and maintains a high efficiency level.


  • Inexpensive PVC Venting Solution

    The high efficiency of Navien’s Condensing Tankless Water Heater results in
    lower exhaust temperatures, allowing for the use of 3”; Sch 40 PVC venting.

    • PVC venting offers a significant cost savings when compared with other venting materials.
    • PVC venting venting is lightweight and easily slides together, reducing installation time and making it easy to run a 100
      feet of venting. *Each elbow deduct 5’ of venting length
  • Eco Pre-mixed Burner

    Eco Pre-mixed Burner

    Navien Technology is Eco Friendly
    • Navien’s condensing technology uses less gas than conventional water
      heaters, resulting in lower CO emissions.
    • The Eco Pre-mixed Burner dramatically reduces NOx emission levels,
      making it the lowest emission levels in the industry.


  • Each Navien Unit Installed Equates to 31 Cypress Trees


A Cypress tree
reduces 30.8 lbs
of CO2 per year.

A Navien Condensing
water heater reduces
964 lbs of CO2 per year.

964 lbs / 30.8 lbs = 31Cypress trees

A Navien Condensing water
heater decreases no less than
964 lbs of CO2 per year
compared to a conventional
tank-type water heater and
324 lbs compared to a conven-
tional tankless-type water


  • Optional Circulation Pump and Mini Buffer Tank (Model A’s)
    • No minimum flow rate required with optional internal circulation mode
    • Minimize hot/cold/hot stacking, the so called Cold Water Sandwich
    • Save installation cost with optional circulation pump and buffer tank
    • The Ready-Link; Cascading System can combined A’s and non A model units together to save money on installation costs and conserve water.
  • Advanced Technology
    1. 1Eliminate Cold Water Sandwich! Reduce Waiting Time!

      Navien’s two microprocessors offer better control and safer operation by continuously cross monitoring each other’s performance to assure proper operation at all times. These two microprocessors not only control the burner for ideal combustion but also maintain the steady hot water temperature.

    2. 2Optimal and Stable Combustion with APS and GPS

      APS (Air Pressure Sensor) maximizes combustion efficiency by sensing and controlling the air required for optimal combustion even in high-wind locations and installations with long vent runs.

    3. GPS (Gas Pressure Sensor) offers stable combustion
      by sensing gas pressure and controlling the fan speed
      to maintain optimal combustion, even under a wide
      range of gas-pressure changes

    4. Three-phased, Pre-Mixed Burner

      3Three-phased, Pre-Mixed Burner

      Controls flame by pre-mixing optimal ratio of gas and air before combustion, reducing emissions and enhancing heat efficiency.

    5. 4Leak Detector

      Built-in leak detector prevents damage to water heater as well as personal property.

    6. 5Air Intake Filter

      An air intake filter prevents debris from entering the system, freeing the burner from elements that would normally cause unstable combustion and reduced energy efficiency.

  • Space Saving Design

    Navien’s condensing tankless water heater’s compact, wall
    mount design occupies approximately 80% less space than
    a traditional 50 gallon tank-type water heater*.

    Navien’s compact design adds free space that can be used
    to store other house hold items.

    *(Navien NR/NP 240A compared with 50 gallon tank, Dec 2010)

title icon Offers the ultimate hot water experience


The design of the product may
change without prior notice to
improve the quality or


Navien’s Ready-Link; System is the best alternative for large volumes of hot water. With its easy venting and installation, up to 16 Navien Water Heaters can be set up as one system. Unlike tank-type water heaters, sudden hot-water cutoffs can be avoided.

  • Abundant Hot Water Supply

    16 units can be linked as one group within the system and several groups can be linked-up into one system.
  • Energy Saving

    Industry’s most efficient multi-unit system with an exceptional rating of 0.96DOE energy factor.
  • Easy Wiring Connection

    Simple wiring link without complicated communication cables and controllers.
  • Easy Ventilating

    Built in APS for longer vent pipe.
  • Low Maintenance Cost

    Even if one unit of the system fails, the rest will operate without any problems.
  • Full Modulation System

    Units activate individually as the demand for hot water increases.
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    Intelligent Remote Control NR-10DU
    (Included with every Navien Tankless Water Heater)

    • Touch activated backlight function
    • Easy-to-Use button type control
    • Built-in recirculation timer for water and energy savings
    • Key-pad lock button prevents inadvertent temperature changes
    • Advanced water heater diagnosis capability and error feedback