Adapt® NC Non-Condensing Ultra-Low NOx Indoor 180,000 BTU Natural Gas Tankless Water Heater

Model ATI-180B-N 100
4.6 out of 5 Customer Rating
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X3® Scale Prevention Technology
Installation Type
Fuel Source
Maximum BTU's

  • 180,000 BTU input
  • Max Flow Rate of 10.5 GPM
  • Highly Efficient – Uniform Energy Factor (UEF) 0.82
  • Adapt® NC Non-Condensing Ultra-Low NOx Indoor 180,000 BTU Natural Gas Tankless Water Heater
    Model ATI-180B-N 100
    4.6 out of 5 Customer Rating
    • reviews, product
    • BV SEO Enabled: RR Not Found
    Product Details
    • 180,000 BTU input
    • Max Flow Rate of 10.5 GPM
    • Highly Efficient – Uniform Energy Factor (UEF) 0.82
    • 5-year limited warranty on all parts in residential applications
    • Ultra Low NOx – Complies with SCAQMD Rule 1146.2
    • Cascade up to 12 units with single cable per heater, cable included
    • Certified from Sea Level to 7,800 ft
    • Ease Of Installation – 3/4” Gas Line or larger
    • Approved for installation in manufactured homes
    • 10-year limited warranty on heat exchanger in residential applications

    • Experience the power of Adapt™ NC non-condensing tankless water heaters, designed to deliver reliable, on-demand hot water for any residential setting. Both indoor and outdoor models provide impressive performance—offering up to 199,000 BTU/h and a maximum flow rate of 10.5 gallons per minute. The ultra-low NOx emissions ensure compliance with stringent air quality standards, while the electronic ignition and freeze protection features guarantee dependable operation year-round. Adapt™ NC models are approved for installation in manufactured homes and can be cascaded (up to 12 units) for larger demands, making them a versatile solution for modern households. Installation is simple, thanks to a standard 3/4” gas line and an included pressure relief valve (X3® models).

      With integrated scale prevention technology (X3® models only), you can enjoy maintenance-free performance that keeps your water heater running like new for years. This patented system eliminates the need for annual descaling and extends the unit's lifespan up to three times longer than unprotected heaters. With no hard water exclusions and a 15-year limited warranty on the heat exchanger, Adapt™ NC with X3® scale prevention delivers peace of mind and exceptional value. Choose Adapt™ NC and experience the next generation of tankless water heating—efficient, durable, and engineered for hassle-free comfort.

    Specifications
    Tech Specs
    Nominal Gallon Capacity
    1 Gallons
    UEF
    0.82
    Maximum BTUs
    180,000
    Power Source
    GAS
    Limited Parts Warranty
    5 Years
    Water Connection Location
    BOTTOM
    Water Connection Size
    0.75"
    First Hour Rating
    1 Gallons
    ASME Certified
    No
    Amperes
    5
    Destination Country
    US
    Flue Diameter
    3.00
    Fuel Source
    NATURAL
    Ignition Type
    Intermittent/Electronic
    Installation Type
    INDOOR
    Limited Heat Exchanger Warranty 
    10 Years
    GPM (@67 F Temp Rise)
    4.7 GPM
    Minimum BTUs
    10,000
    Application
    RESIDENTIAL
    Shipping Height 
    16.25"
    Shipping Length 
    34.25"
    Shipping Width 
    20.63"
    Side Loop
    No
    Voltage
    120
    Dimension & Venting
    Type
    Water Heater
    Height
    25.5"
    Width
    15.5"
    Shipping Weight
    73 lbs
    Vent Material
    Category III
    Marketing Videos
    Adapt® NC Non-Condensing Gas Tankless Water Heater Features & Benefits
    All Reviews for Adapt® NC Tankless Non-Condensing X3 (100 series)
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