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  • Weil Mclain 383-500-726 Ultra 399 CT High Efficiency Boiler Propane or Natural Gas

    Brand & Part #: Weil-McLain 383500726 SKU #: wei383500726

    UPC #: 672619200043

    Availability : In stock

    Only 3 left

    Regular Price: Was: $10,423.00


    You Save $2,954.01 (28%)

    Helpful Information



    Series 3 Ultra CT Boilers

    Note: Product Title reflects this boiler's IBR Net Output Rating

    Key Features

    • Gas fired water boiler with cast aluminum heat exchanger
    • Venturi mixing body mixes air and gas providing higher efficiency
    • Designed to operate in low temperature condensing applications
    • Outdoor reset and domestic hot water priority standard
    • Negative regulated gas valve precisely delivers gas to the boiler
    • Electronic control module automatically adjusts blower speed and gas flow rate in response to environment
    • Modulates with 5 to 1 turndown ratio
    • Variable speed motor matches combustion output to heating needs
    • High grade stainless steel burner features quiet operation, high efficiency, and cleaner combustion for low NOx applications.
    • Propane Conversion Orifice included for LP Gas Applications

    NOTE: May require the use of a lift gate. Please note the product weighs 297 lbs 


    Fuel Type: Propane
      Natural Gas
    AFUE % 91.7%
    System Type: Hydronic (Water)
    Features: Direct Vent
      EI/Spark Ignition
    Vent Size: 4"
    Water Connection: 1-1/4"
    Gas Connection: 3/4"
    BTU Input: 399000
    DOE Rating: 365000
    IBR Rating: 317000
    Warranty: Limited 15 Year Warranty on Heat Exchanger/ 1-year on parts
    Depth (Inches): 22-1/8"
    Height (Inches): 47-3/4"
    Width (Inches): 22-13/16"
    Vent Type: PVC
    Boiler Type: High Efficiency
    Application: Heating

    Additional Info

    Additional Info

    MPN 383500726
    Brands Weil-McLain
    Fuel Type Natural Gas
    BTU Input 200,000 and Above
    BTU Output 200,000 and Above
    Availability Available to Ship Immediately


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