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Natural Gas Boilers

306 Products
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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: 175K BTU Gross Input, 144K BTU DOE Capacity, 108K BTU Net IBR Capacity.
Item#: 37820
Model#: PIN6SNI-ME2
Brand: Burnham
$5,144.70
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 210K BTU Gross Input, 173K BTU DOE Capacity, 130K BTU Net IBR Capacity.
Item#: 37822
Model#: PIN7SNI-ME2
Brand: Burnham
$5,659.67
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Disassembled. Ratings: 245K BTU Gross Input, 202K BTU DOE Capacity, 152K BTU Net IBR Capacity.
Item#: 37824
Model#: KIN8LNI-LE2
Brand: Burnham
$5,457.03
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Disassembled. Ratings: 280K BTU Gross Input, 231K BTU DOE Capacity, 174K BTU Net IBR Capacity.
Item#: 37826
Model#: KIN9LNI-LE2
Brand: Burnham
$5,900.83
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve and Hydrolevel sensors. Ships Packaged. Ratings: 62K BTU Gross Input, 51K BTU DOE Capacity, 38K BTU Net IBR Capacity.
Item#: 37835
Model#: PIN3SNI-HE2
Brand: Burnham
$3,416.40
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 105K BTU Gross Input, 88K BTU DOE Capacity, 77K BTU Net IBR Capacity. Includes Circulator.
Item#: 38003
Model#: 304BNI-T
Brand: Burnham
$3,270.07
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 140K BTU Gross Input, 117K BTU DOE Capacity, 102K BTU Net IBR Capacity. Includes Circulator.
Item#: 38005
Model#: 305BNI-T
Brand: Burnham
$3,668.01
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 175K BTU Gross Input, 146K BTU DOE Capacity, 127K BTU Net IBR Capacity. Includes Circulator.
Item#: 38007
Model#: 306BNI-T
Brand: Burnham
$4,209.93
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 210K BTU Gross Input, 176K BTU DOE Capacity, 153K BTU Net IBR Capacity. Includes Circulator.
Item#: 38009
Model#: 307BNI-T
Brand: Burnham
$4,728.38
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 245K BTU Gross Input, 205K BTU DOE Capacity, 178K BTU Net IBR Capacity. Includes Circulator.
Item#: 38011
Model#: 308BNI-T
Brand: Burnham
$5,175.66
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 280K BTU Gross Input, 234K BTU DOE Capacity, 203K BTU Net IBR Capacity. Includes Circulator.
Item#: 38013
Model#: 309BNI-T
Brand: Burnham
$5,784.71
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 70K BTU Gross Input, 59K BTU DOE Capacity, 51K BTU Net IBR Capacity. Includes Circulator.
Item#: 38015
Model#: 303BNI-T
Brand: Burnham
$2,994.26
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Floor Mounted, Cast Iron Condensing Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 175K BTU Gross Input, 161K BTU DOE Capacity, 140K BTU Net IBR Capacity. Includes Circulator.
Item#: 49649
Model#: 382200613
Brand: Weil-McLain
$5,666.49
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Floor Mounted, Cast Iron Condensing Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 70K BTU Gross Input, 65K BTU DOE Capacity, 56K BTU Net IBR Capacity. Includes Circulator.
Item#: 49650
Model#: 382200610
Brand: Weil-McLain
$3,888.00
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Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 1,000K BTU Gross Input, 958K BTU DOE Capacity, 833K BTU Net IBR Capacity.
Item#: 49925
Model#: 383600400
Brand: Weil-McLain
$23,609.00
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Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 1,000K BTU Gross Input, 958K BTU DOE Capacity, 833K BTU Net IBR Capacity.
Item#: 49926
Model#: 383600403
Brand: Weil-McLain
$23,609.00
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Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 1,500K BTU Gross Input, 1,437K BTU DOE Capacity, 1,250K BTU Net IBR Capacity.
Item#: 49927
Model#: 383600401
Brand: Weil-McLain
$29,179.00
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Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 1,500K BTU Gross Input, 1,437K BTU DOE Capacity, 1,250K BTU Net IBR Capacity.
Item#: 49928
Model#: 383600404
Brand: Weil-McLain
$29,179.00
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Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 2,000K BTU Gross Input, 1,906K BTU DOE Capacity, 1,657K BTU Net IBR Capacity.
Item#: 49930
Model#: 383600402
Brand: Weil-McLain
$34,159.00
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Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 2,000K BTU Gross Input, 1,906K BTU DOE Capacity, 1,657K BTU Net IBR Capacity.
Item#: 49931
Model#: 383600405
Brand: Weil-McLain
$34,159.00
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Floor/Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 299K BTU Gross Input, 280K BTU DOE Capacity, 243K BTU Net IBR Capacity. Includes Circulator.
Item#: 58492
Model#: 383900001
Brand: Weil-McLain
$8,875.91
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Floor/Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 399K BTU Gross Input, 383K BTU DOE Capacity, 333K BTU Net IBR Capacity. Includes Circulator.
Item#: 58493
Model#: 383900002
Brand: Weil-McLain
$10,546.00
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Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 80K BTU Gross Input, 72K BTU DOE Capacity, 63K BTU Net IBR Capacity. Includes Circulator.
Item#: 58576
Brand: Burnham
$4,320.74
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Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 105K BTU Gross Input, 96K BTU DOE Capacity, 83K BTU Net IBR Capacity. Includes Circulator.
Item#: 58578
Brand: Burnham
$4,770.44
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