Natural Gas Boilers

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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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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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Maximum Input Capacity (BTU) Learn More
Maximum Input Capacity (BTU)
The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used.
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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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Vent Type Learn More
Vent Type
Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.
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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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Modulating/Staging Learn More
Modulating/Staging
Stages are unique speeds or levels that equipment can operate at. More stages allow for better fine-tuned control of output, which improves comfort and efficiency. Modulating equipment can operate across a range of levels, giving the highest level of fine-tuned control.
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Ultra Low NOx Emissions Learn More
Ultra Low NOx Emissions
NOx is a byproduct of the combustion process, and it's output is regulated in some jurisdictions. Many regulators mirror SCAQMD rules, which regulate air quality for some parts of Southern California. Ultra Low NOx appliances emit less than 10-14 ng/J (nanogram per Joule) of NOx.
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Efficiency (%)
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Low NOx Emissions Learn More
Low NOx Emissions
NOx is a byproduct of the combustion process, and it's output is regulated in some jurisdictions. Many regulators mirror SCAQMD rules, which regulate air quality for some parts of Southern California. Low NOx appliances emit less than 40 ng/J (nanogram per Joule) of NOx.
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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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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 222k BTU Gross Input, 189k BTU DOE Capacity, 164k BTU Net IBR Capacity. Includes Circulator.
Item#: 109169
Model#: 381359054
Brand: Weil-McLain
$4,933.81
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 222k BTU Gross Input, 189k BTU DOE Capacity, 164k BTU Net IBR Capacity. Includes Circulator.
Item#: 109170
Model#: 381359055
Brand: Weil-McLain
$4,933.81
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 90k BTU Gross Input, 77k BTU DOE Capacity, 67k BTU Net IBR Capacity. Includes Circulator.
Item#: 109195
Model#: 381359004
Brand: Weil-McLain
$3,100.00
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 90k BTU Gross Input, 77k BTU DOE Capacity, 67k BTU Net IBR Capacity. Includes Circulator.
Item#: 109197
Model#: 381359036
Brand: Weil-McLain
$3,164.04
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 90k BTU Gross Input, 77k BTU DOE Capacity, 67k BTU Net IBR Capacity. Includes Circulator.
Item#: 109198
Model#: 381359037
Brand: Weil-McLain
$3,164.04
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 90k BTU Gross Input, 77k BTU DOE Capacity, 67k BTU Net IBR Capacity. Includes Circulator.
Item#: 109199
Model#: 381359038
Brand: Weil-McLain
$3,164.04
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 90k BTU Gross Input, 77k BTU DOE Capacity, 67k BTU Net IBR Capacity. Includes Circulator.
Item#: 109200
Model#: 381359039
Brand: Weil-McLain
$3,164.04
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 233k BTU Gross Input, 198k BTU DOE Capacity, 172k BTU Net IBR Capacity. Includes Circulator.
Item#: 109212
Model#: 113081460
Brand: Weil-McLain
$4,367.69
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 70K BTU Gross Input, 60K BTU DOE Capacity, 52K BTU Net IBR Capacity. Includes Circulator.
Item#: 109809
Brand: Crown Boiler Co.
$2,825.00
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 105K BTU Gross Input, 90K BTU DOE Capacity, 78K BTU Net IBR Capacity. Includes Circulator.
Item#: 109810
Brand: Crown Boiler Co.
$3,014.00
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 140K BTU Gross Input, 120K BTU DOE Capacity, 104K BTU Net IBR Capacity. Includes Circulator.
Item#: 109811
Brand: Crown Boiler Co.
$3,245.00
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 175K BTU Gross Input, 150K BTU DOE Capacity, 130K BTU Net IBR Capacity. Includes Circulator.
Item#: 109812
Brand: Crown Boiler Co.
$3,577.00
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 210K BTU Gross Input, 179K BTU DOE Capacity, 156K BTU Net IBR Capacity. Includes Circulator.
Item#: 109813
Brand: Crown Boiler Co.
$3,837.00
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 245K BTU Gross Input, 208K BTU DOE Capacity, 181K BTU Net IBR Capacity. Includes Circulator.
Item#: 109814
Brand: Crown Boiler Co.
$4,081.00
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 70K BTU Gross Input, 60K BTU DOE Capacity, 52K BTU Net IBR Capacity. Includes Circulator.
Item#: 109821
Brand: Crown Boiler Co.
$2,988.00
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 105K BTU Gross Input, 90K BTU DOE Capacity, 78K BTU Net IBR Capacity. Includes Circulator.
Item#: 109822
Brand: Crown Boiler Co.
$3,194.00
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 140K BTU Gross Input, 120K BTU DOE Capacity, 104K BTU Net IBR Capacity. Includes Circulator.
Item#: 109823
Brand: Crown Boiler Co.
$3,400.00
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 175K BTU Gross Input, 150K BTU DOE Capacity, 130K BTU Net IBR Capacity. Includes Circulator.
Item#: 109824
Brand: Crown Boiler Co.
$3,709.00
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 210K BTU Gross Input, 179K BTU DOE Capacity, 156K BTU Net IBR Capacity. Includes Circulator.
Item#: 109825
Brand: Crown Boiler Co.
$4,126.00
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 245K BTU Gross Input, 208K BTU DOE Capacity, 181K BTU Net IBR Capacity. Includes Circulator.
Item#: 109826
Brand: Crown Boiler Co.
$4,373.00
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Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 207K BTU Maximum Input Capacity, 171K BTU DOE Capacity, 128K BTU Net IBR Capacity.
Item#: 111059
Brand: ProSelect Force Boilers
$4,028.00
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Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 138K BTU Maximum Input Capacity, 113K BTU DOE Capacity, 85K BTU Net IBR Capacity.
Item#: 111060
Brand: ProSelect Force Boilers
$3,277.00
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Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 69K BTU Maximum Input Capacity, 56K BTU DOE Capacity, 42K BTU Net IBR Capacity.
Item#: 111061
Brand: ProSelect Force Boilers
$2,732.00
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Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 241K BTU Maximum Input Capacity, 199K BTU DOE Capacity, 149K BTU Net IBR Capacity.
Item#: 111062
Brand: ProSelect Force Boilers
$4,355.00
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