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  • Weil Mclain 383-500-723 Ultra 155 CT High Efficiency Boiler Propane or Natural Gas

    Brand & Part #: Weil-McLain 383500723 SKU #: wei383500723

    UPC #: 672619200012

    Availability : In stock

    Only 3 left

    Regular Price: Was: $5,899.00


    You Save $1,901.01 (32%)

    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


    Fuel Type: Propane
      Natural Gas
    AFUE % 93.5%
    System Type: Hydronic (Water)
    Features: Direct Vent
      EI/Spark Ignition
    Vent Size: 3"
    Water Connection: 1"
    Gas Connection: 1/2"
    BTU Input: 155000
    DOE Rating: 139000
    IBR Rating: 123000
    Warranty: Limited 15 Year Warranty on Heat Exchanger/ 1-year on parts
    Depth (Inches): 19-15/16"
    Height (Inches): 43-1/16"
    Width (Inches): 22-13/16"
    Vent Type: PVC
    Boiler Type: High Efficiency
    Application: Heating

    Additional Info

    Additional Info

    MPN 383500723
    Brands Weil-McLain
    Fuel Type Natural Gas
    BTU Input 150,000 - 175,000
    BTU Output 100,000 - 125,000
    Availability Available to Ship Immediately
    Special Shipping Group boilerover


    Customer Reviews (1)

    overall pleasedReview by Meangene
    I have used this unit for about 9 years now. Pretty much been trouble free. Blower fan went out (about $400 part) it was covered under warranty. I cleaned for the first time the other day. Annual cleaning is important. Unit was a bit pricey but I am overall satisfied with performance. (Posted on 11/12/2013)
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