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Oil Boilers

78 Products
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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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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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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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Price
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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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Product Height (Inches)
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Product Width (Inches)
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Product Depth (Inches)
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Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 1.35 GPH Gross Input, 164K BTU DOE Capacity, 123K BTU Net IBR Capacity.
Item#: 37899
Model#: MST513SL-HB
Brand: Burnham
$5,406.42
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Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 1.65 GPH Gross Input, 201K BTU DOE Capacity, 151K BTU Net IBR Capacity.
Item#: 37900
Model#: MST629SL-HB
Brand: Burnham
$5,605.00
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Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 0.60 GPH Gross Input, 74K BTU DOE Capacity, 69K BTU Net IBR Capacity. Includes Circulator.
Item#: 37903
Model#: MPO-IQ84-TB
Brand: Burnham
$3,406.00
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Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 0.82 GPH Gross Input, 101K BTU DOE Capacity, 88K BTU Net IBR Capacity. Includes Circulator.
Item#: 37905
Model#: MPO-IQ115-TB
Brand: Burnham
$3,277.68
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Factory-Direct
Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 0.80 GPH Gross Input, 97K BTU DOE Capacity, 73K BTU Net IBR Capacity.
Item#: 47482
Brand: Crown Boiler Co.
$4,100.00
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Factory-Direct
Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 0.80 GPH Gross Input, 97K BTU DOE Capacity, 73K BTU Net IBR Capacity.
Item#: 47483
Brand: Crown Boiler Co.
$4,400.00
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Factory-Direct
Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 1.0 GPH Gross Input, 123K BTU DOE Capacity, 107K BTU Net IBR Capacity. Includes Circulator.
Item#: 47486
Brand: Crown Boiler Co.
$4,077.00
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Factory-Direct
Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 1.0 GPH Gross Input, 122K BTU DOE Capacity, 92K BTU Net IBR Capacity.
Item#: 47489
Brand: Crown Boiler Co.
$4,050.00
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Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 1.0 GPH Gross Input, 122K BTU DOE Capacity, 92K BTU Net IBR Capacity.
Item#: 47490
Brand: Crown Boiler Co.
$4,400.00
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Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 1.30 GPH Gross Input, 160K BTU DOE Capacity, 139K BTU Net IBR Capacity. Includes Circulator.
Item#: 47492
Brand: Crown Boiler Co.
$3,920.00
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Factory-Direct
Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 1.30 GPH Gross Input, 158K BTU DOE Capacity, 119K BTU Net IBR Capacity.
Item#: 47494
Brand: Crown Boiler Co.
$4,650.00
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Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 1.30 GPH Gross Input, 158K BTU DOE Capacity, 119K BTU Net IBR Capacity.
Item#: 47495
Brand: Crown Boiler Co.
$4,900.00
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Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 1.60 GPH Gross Input, 197K BTU DOE Capacity, 171K BTU Net IBR Capacity. Includes Circulator.
Item#: 47497
Brand: Crown Boiler Co.
$3,563.00
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Factory-Direct
Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 1.60 GPH Gross Input, 195K BTU DOE Capacity, 146K BTU Net IBR Capacity.
Item#: 47499
Brand: Crown Boiler Co.
$5,250.00
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Factory-Direct
Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 1.60 GPH Gross Input, 195K BTU DOE Capacity, 146K BTU Net IBR Capacity.
Item#: 47500
Brand: Crown Boiler Co.
$5,570.00
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Factory-Direct
Floor Mounted, Cast Iron Boiler. Ships Disassembled. Ratings: 1.40 GPH Gross Input, 171K BTU DOE Capacity, 149K BTU Net IBR Capacity.
Item#: 72594
Model#: G215/4-AFG
Brand: Buderus
$4,504.00
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Floor Mounted, Cast Iron Boiler. Ships Disassembled. Ratings: 1.10 GPH Gross Input, 134K BTU DOE Capacity, 117K BTU Net IBR Capacity.
Item#: 72595
Model#: G215/3-AFG
Brand: Buderus
$4,213.00
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Factory-Direct
Floor Mounted, Cast Iron Boiler. Ships Disassembled. Ratings: 2.10 GPH Gross Input, 256K BTU DOE Capacity, 223K BTU Net IBR Capacity.
Item#: 72603
Model#: G215/6-CF375
Brand: Buderus
$6,812.00
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Factory-Direct
Floor Mounted, Cast Iron Boiler. Ships Disassembled. Ratings: 0.80 GPH Gross Input, 101K BTU DOE Capacity, 88K BTU Net IBR Capacity.
Item#: 81641
Model#: MPO-IQ115-TL
Brand: Burnham
$2,731.00
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Factory-Direct
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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Factory-Direct
Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 115K BTU Maximum Input Capacity, 100K BTU DOE Capacity, 87K BTU Net IBR Capacity.
Item#: 111072
Brand: ProSelect Force Boilers
$3,249.00
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In-Stock
Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 182K BTU Maximum Input Capacity, 160K BTU DOE Capacity, 139K BTU Net IBR Capacity.
Item#: 111073
Brand: ProSelect Force Boilers
$3,974.00
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In-Stock
Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 140K BTU Maximum Input Capacity, 123K BTU DOE Capacity, 107K BTU Net IBR Capacity.
Item#: 111074
Brand: ProSelect Force Boilers
$3,424.00
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In-Stock
Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 74K BTU Maximum Input Capacity, 73K BTU DOE Capacity, 63K BTU Net IBR Capacity.
Item#: 111075
Brand: ProSelect Force Boilers
$3,054.00
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In-Stock