Cyclone® FLEX™ 119-Gallon Condensing Commercial Gas Water Heater with Adaptive Gas Technology

Model BTH-251A 400
Capacity (Gallons)
Fuel Source
ASME Indicator
Maximum BTU's

  • ENERGY STAR® certified—95% or greater efficiency, reducing energy costs and maximizing performance
  • Adaptive Gas Control System—Automatically adjusts to fuel qualities and abnormalities
  • Intelligent Control System—Features a 7-inch color touch display with iCOMM™ connectivity for remote monitoring and precise temperature control
  • Cyclone® FLEX™ 119-Gallon Condensing Commercial Gas Water Heater with Adaptive Gas Technology
    Model BTH-251A 400
    Product Details
    • ENERGY STAR® certified—95% or greater efficiency, reducing energy costs and maximizing performance
    • Adaptive Gas Control System—Automatically adjusts to fuel qualities and abnormalities
    • Intelligent Control System—Features a 7-inch color touch display with iCOMM™ connectivity for remote monitoring and precise temperature control
    • Submerged Combustion Chamber—Virtually eliminates radiant heat loss, improving overall energy utilization
    • Flexible Venting Options—Supports conventional power venting or direct venting with low-cost PVC, CPVC, polypropylene, or stainless steel materials
    • Leak Detection Module—Alerts users with audible alarms and notifications via iCOMM™ connectivity for proactive maintenance
    • Space-Saving Design—Allows for flexible installation with minimal clearance requirements
    • Powered Anodes—Non-sacrificial and maintenance-free, providing long-lasting tank protection in varying water conditions
    • Helical Coil Heat Exchanger—Enhances heat transfer while minimizing lime scale buildup, ensuring long-term efficiency
    • 3-year limited tank warranty and 1-year limited parts warranty for added peace of mind

    • The Cyclone® FLEX™ condensing water heaters by A. O. Smith are designed to meet the demanding needs of commercial applications with advanced adaptive gas technology and maximum flexibility. These water heaters offer exceptional thermal efficiency of 95% or greater, ensuring optimal energy savings and performance. Available in models ranging from 100,000 to 500,000 BTU/h, the Cyclone® FLEX™ series incorporates a unique helical coil heat exchanger that maximizes heat transfer while reducing lime scale buildup, maintaining efficiency over time. The submerged combustion chamber design minimizes radiant heat loss, while the high-efficiency modulating premix powered burner ensures quiet operation and precise combustion control. These features make Cyclone® FLEX™ water heaters a reliable and cost-effective solution for commercial water heating needs.

      The Cyclone® FLEX™ series also includes innovative features such as the AIQ™ adaptive gas control system, which adjusts to varying fuel qualities and abnormalities for improved combustion and reliability. The intelligent control system, equipped with a 7-inch color touch display and iCOMM™ connectivity, provides detailed status information, precise temperature control, and remote monitoring capabilities. These water heaters come standard with powered anodes for long-lasting tank protection, leak detection modules, and Permaglas® Ultra Coat™ glass lining for enhanced durability. ? With space-saving designs, flexible venting options, and compliance with stringent air quality standards, Cyclone® FLEX™ water heaters deliver superior performance, ease of installation, and peace of mind for commercial users.

    Specifications
    Tech Specs
    Nominal Gallon Capacity
    119 Gallons
    Rated Storage Volume
    122 Gallons
    Thermal Efficiency
    97%
    Maximum BTUs
    251,000
    Power Source
    GAS
    Limited Tank Warranty
    3 Years
    Limited Parts Warranty
    1 Years
    T&P Relief Valve
    Yes
    Water Connection Location
    B/T
    ASME Certified
    Yes
    ASME Stamp
    HLW
    Amperes
    5
    Destination Country
    US
    Digital Display
    true
    ENERGY STAR® Certified
    true
    Fuel Source
    NATURAL
    Installation Type
    INDOOR
    Minimum BTUs
    195,000.00
    Application
    COMMERCIAL
    Shipping Height 
    85"
    Shipping Length 
    42"
    Shipping Width 
    36"
    Side Loop
    No
    Voltage
    120
    Dimension & Venting
    Type
    Water Heater
    Diameter
    33.13 in."
    Shipping Weight
    952lbs