ProLine® XE Ultra-Low NOx Indoor 190,000 BTU Non-Condensing Natural Gas/Liquid Propane Tankless Water Heater

Model ATI-310U
5 out of 5 Customer Rating
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Installation Type
Maximum BTU's

  • Continuous flow rate up to 8.0 GPM
  • Wall-mount design saves valuable space and allows for additional storage and flexibility
  • Commercial-grade copper heat exchanger is 25x better than stainless steel at heat transfer, stabilizing outgoing water temperatures quicker
  • Product Details
    • Continuous flow rate up to 8.0 GPM
    • Wall-mount design saves valuable space and allows for additional storage and flexibility
    • Commercial-grade copper heat exchanger is 25x better than stainless steel at heat transfer, stabilizing outgoing water temperatures quicker
    • Easily convertible from natural gas to propane with supplied kit
    • Highly efficient condensing Ultra-Low Nox tankless water heater delivers up to .81 Uniform Energy Factor (UEF)
    • Vents up to 60 feet using 4” Category III Stainless Steel
    • Includes integrated temperature controls and advanced diagnostics to simplify troubleshooting
    • Safety features include built-in freeze protection, overheat cut-off fuse and air-fuel ratio (AFR) sensor
    • 15-year limited warranty on heat exchanger in residential applications

    • The 310U Series is great for two bath homes in cold climates. The 310U features a max flow rate of 8.0 gallons per minute providing enough hot water to run three showers at the same time. The design allows for a variety of installation options. Complies with Ultra-Low NOx regulations and meets energy efficiency requirements of ASHRAE 90.1b-1992. The ATI-310U tankless water heater uses up to 190,000 BTU/h of natural gas/liquid propane to deliver an endless supply of hot water for a 2.5 bath home in northern climates and up to a 3.5 bath home in southern climates (one shower head per bath). The ATI-310U has a Uniform Energy Factor of 0.81. With an industry leading 15-year limited warranty, the ATI-310U tankless water heater provides years of hot water through innovation and quality. A. O. Smith’s ProLine® water heaters are residential products built to commercial-grade standards and are only available for purchase through professional wholesalers and contractors.

    Specifications
    Tech Specs
    UEF
    0.82
    Maximum BTUs
    190,000
    Power Source
    GAS
    Limited Parts Warranty
    5 Years
    Water Connection Location
    BOTTOM
    Emissions
    Ultra-Low NOx
    ASME Certified
    No
    Destination Country
    US
    Digital Display
    true
    Fuel Source
    NATURAL
    Installation Type
    INDOOR
    Limited Heat Exchanger Warranty 
    15 Years
    Max Flow Rate
    4.70
    Minimum BTUs
    15,000.00
    Application
    RESIDENTIAL
    Product Tier
    ProLine® XE
    Shipping Height 
    28"
    Shipping Length 
    16.625"
    Shipping Width 
    12.375"
    Side Loop
    No
    Dimension & Venting
    Type
    Water Heater
    Height
    20.5"
    Width
    13.75"
    Shipping Weight
    39lbs
    Vent Type
    Direct Vent
    Find a Replacement
    Current Product
    Option 2
    Option 3
    ProLine® XE Ultra-Low NOx Indoor 190,000 BTU Non-Condensing Natural Gas/Liquid Propane Tankless Water Heater
    ProLine® XE Ultra-Low NOx Indoor 199,000 BTU Non-Condensing Natural Gas/Liquid Propane Tankless Water Heater
    ProLine® XE Ultra-Low NOx Indoor 160,000 BTU Condensing Natural Gas Tankless Water Heater
    ATI-310U
    ATI-510U
    ATI-240H
    Rebates up to $300 +
    Rebates up to $300 +
    Rebates up to $300 +
    Width
    13.75"
    13.75"
    17.75"
    Depth
    10"
    10"
    11.25"
    Height
    20.5"
    20.5"
    23.63"
    Shipping Weight
    39lbs
    40lbs
    70lbs
    Power Source
    GAS
    GAS
    GAS
    Limited Tank Warranty
    0 Years
    0 Years
    0 Years
    Limited Parts Warranty
    5 Years
    5 Years
    5 Years
    Water Connection Location
    BOTTOM
    BOTTOM
    BOTTOM
    Thermal Efficiency
    0%
    0%
    0%
    All Reviews for ProLine® XE Tankless Non-Condensing Ultra-Low Nox (200 series)
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