85-90% Efficiency Weil-McLain Boilers

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Net I=B=R Capacity (BTU) Learn More
Net I=B=R Capacity (BTU)
I=B=R, also referred to as Net Output or AHRI Capacity, is the rated heat output of a boiler after accounting for combustion efficiency, piping loss, and an extra pickup factor. We recommend sizing steam boilers based on the I=B=R rating.
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DOE Heating Capacity (BTU) Learn More
DOE Heating Capacity (BTU)
Also referred to as Gross Output, this is the output of a boiler after accounting for combustion efficiency. We recommend sizing hot water boilers based on the DOE Heating Capacity.
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AFUE (%) Learn More
AFUE (%)
AFUE (Annual Fuel Utilization Efficiency) measures the efficiency of combustion equipment over the entire heating season, and is calculated by dividing the amount of energy that is actually heating your home by the total energy contained in the fuel used by the boiler/furnace.
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Product Line
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DHW Production Learn More
DHW Production
DHW (Domestic Hot Water) is potable water for uses other than space heat. Some boilers are able to provide DHW "out of the box", while others can do so with the purchase of optional accessories.
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Product Height (Inches)
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Price
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Medium Learn More
Medium
Medium refers to the substance that carries heat through the heating system. Systems are either designed to use either Hot Water or Steam as a medium, and components are usually specific to one or the other.
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Product Width (Inches)
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Product Depth (Inches)
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Input Rate (GPH)
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Maximum Altitude (Feet)
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Includes Pump
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Flue Connection Size (Inches)
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Supply Connection (Inches)
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$3,236.00
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$3,634.00
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$2,916.00
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$4,888.13
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Floor mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 123K BTU DOE Capacity, 107K BTU Net IBR Capacity. Includes Circulator.
Item#: 81666
Model#: 386901006
Brand: Weil-McLain
$2,989.00
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$4,738.00
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$3,258.21
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$2,764.73
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$4,309.85
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$3,951.00
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$3,378.00
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$3,880.00
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$3,258.21
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$3,776.31
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$4,309.85
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$2,387.13
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$2,959.72
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$3,477.00
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$4,013.80
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$4,429.41
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$3,876.35
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$4,413.00
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$3,507.91
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$4,048.77
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