ProLine® XE Ultra-Low NOx Indoor 199,000 BTU Condensing Natural Gas Tankless Water Heater

Model ATI-540H 100
4.8 out of 5 Customer Rating
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Installation Type
Fuel Source
Maximum BTU's

  • Continuous flow rate up to 10.0 GPM
  • Primary commercial-grade copper heat exchanger is 25x better than stainless steel at heat transfer, stabilizing outgoing water temperatures quicker
  • Secondary heat exchanger is made of 316L Stainless Steel to protect against corrosion

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    What to Expect from this Model
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    Number of minutes you can enjoy a shower before running out of hot water. Assumes a 2.1 GPM flow rate
    Unlimited
    single shower length
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    Number of back-to-back showers you can take without running out of hot water. Assumes a 2.1 GPM flow rate and an 8 minute shower length
    Unlimited
    back-to-back
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    Number of showers you can take at the same time without running out of hot water. Assumes a 2.1 GPM flow rate and an 8 minute shower length
    2.7 showers
    at the same time
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    Biggest tub this water heater will fill without running out of hot water. Assumes a 5.0 GPM flow rate, and a 67% fill level
    Unlimited
    max tub size
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    The estimated annual cost to operate this water heater in your location
    $209/year
    est. energy cost
    Based on location results for Columbus, OH 43215
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    Product Details
    • Continuous flow rate up to 10.0 GPM
    • Primary commercial-grade copper heat exchanger is 25x better than stainless steel at heat transfer, stabilizing outgoing water temperatures quicker
    • Secondary heat exchanger is made of 316L Stainless Steel to protect against corrosion
    • Highly efficient condensing Ultra-Low Nox tankless water heater delivers up to .94 Uniform Energy Factor (UEF)
    • Flexible power direct vent design allows for venting up to 100 feet using either PVC, CPVC, polypropylene or ABS Pipe (solid core)
    • Common vent up to 8 units
    • Includes integrated temperature controls and advanced diagnostics to simplify troubleshooting
    • Safety features include exhaust & water temperature safety control, overheat cut-off fuse and air-fuel ratio (AFR) sensor
    • 15-year limited warranty on heat exchanger in residential applications

      • The 540 series is well suited for residential use. Utilizing commercial grade copper alloy for the heat exchanger tubing, the 540 series is also suitable for heavier-residential usages such as domestic recirculation systems. Remote control included as a standard feature on all Outdoor models. Indoor models are certified up to 10,100 ft. altitude. Provides a variety of installation options: outdoor and direct vent. Complies with Ultra-Low NOx regulations and meets the energy efficiency requirements. Easy-Link System capable up to 4 units. The ATI-540H-N tankless water heater uses up to 199,000 BTU/hr of natural gas to deliver an endless supply of hot water for a 3 bath home in northern climates and up to a 4 bath home in southern climates (one shower head per bath). Utilizing condensing technology, this heater is extremely efficient with a Uniform Energy Factor of 0.93. With an industry leading 15-year limited warranty, the ATI-540H-N 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
    0.93
    Maximum BTUs
    199,000
    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
    5.8 GPM
    Minimum BTUs
    15,000.00
    Application
    RESIDENTIAL
    Shipping Height 
    33.25"
    Shipping Length 
    21.75"
    Shipping Width 
    15.625"
    Side Loop
    No
    Dimension & Venting
    Type
    Water Heater
    Height
    23.63"
    Width
    17.75"
    Shipping Weight
    70lbs
    Vent Type
    Power Direct Vent
    All Reviews for ProLine® XE Tankless High Efficiency Condensing (100 series)
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