• Technical Specifications


    Outdoor Unit Dimensions

    23.6” (H) x 13.8” (W) x 9.4” (D)


    54 lbs.

    Gas Consumption

    Min: 16,000 btuh
    Max: 199,900 btuh

    (NG & LP)

    Natural Gas/Propane

    Capacity Range

    0.5 - 9.8 GPM

    Thermal Efficiency


    Temperature Settings

    100-185° F (in 5° F Intervals)


    .88 (LP) .82 (NG)


    Recirculation compatible
    Multi-system up to 6 units

  • Models and Accessories

    Model Number and Description

    NC199 OD

    GQ-2857WZ US LP

    NC199 OD

    GQ-2857WZ US NG

  • Full Description

    With more power than any tankless water heater in its class, the NC199 series is ideal for mid-size homes with up to 4 showers. Built-in features include safety lock-out, freeze protection, and high elevation adjustment. PVC CANNOT be used for venting.

    These units offer several innovations:
    Safety lock out – Default max. 120 degrees (refer to owner’s manual for higher temp)
    Dual flame burner – Noritz exclusive! Minimizes temperature fluctuations.
    Fully modulating – Automatically adjusts burner level accordingly.
    Turbo Flow – Up to 9.8 GPM @ 35 degree temperature rise (7.5 GPM @ 45 degree rise).
    Quick Connect – Doubles the output by connecting two identical heaters.
    Direct ignition – No standby pilot light.
    Thermal fuse – Automatic overheat protection system.
    Resin coated PC board – Increases durability and protection from elements.
    Automatic air regulator – Monitors internal temperature/maximizes burner efficiency.
    Commercial grade heat exchanger – 25% thicker piping than our competition.



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