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Net I=B=R Capacity (BTU)
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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)
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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)
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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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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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AFUE (%)
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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
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
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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Fuel Type
To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
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Crown Boiler Aruba 5 - 59K BTU - 84% AFUE - Hot Water Gas Boiler - Chimney Vent
Model: AWR070BNST3PSU
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 Taco Circulator.
6% Buy This
(1)
$1,860.53
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Weil-McLain CGa-4-PIDN - 85K BTU - 84.0% AFUE - Hot Water Gas Boiler - Chimney Vent
Model: 381359074
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 100k BTU Gross Input, 85k BTU DOE Capacity, 74k BTU Net IBR Capacity. Includes Circulator.
6% Buy This
(1)
$1,899.99
In-Stock
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Weil-McLain CGa-6-PIDN - 141K BTU - 84.0% AFUE - Hot Water Gas Boiler - Chimney Vent
Model: 381359078
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 166k BTU Gross Input, 141k BTU DOE Capacity, 123k BTU Net IBR Capacity. Includes Circulator.
4% Buy This
(2)
$2,579.09
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Weil-McLain CGi-5-PIN - 102K BTU - 84.0% AFUE - Hot Water Gas Boiler - Power Vent
Model: 381359006
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 119k BTU Gross Input, 102k BTU DOE Capacity, 89k BTU Net IBR Capacity. Includes Circulator.
4% Buy This
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$2,459.99
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Weil-McLain CGa-8-PIDN - 198K BTU - 84.0% AFUE - Hot Water Gas Boiler - Chimney Vent
Model: 113081460
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.
4% Buy This
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$3,139.99
In-Stock
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Crown Boiler Aruba 5 - 117K BTU - 84% AFUE - Hot Water Gas Boiler - Chimney Vent
Model: AWR140BNST3PSU
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 Taco Circulator.
3% Buy This
(1)
$2,161.81
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Weil-McLain EG-45-S-PIDN - 94K BTU - 82.9% AFUE - Steam Gas Boiler - Chimney Vent
Model: 118454300
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Disassembled. Ratings: 150K BTU Gross Input, 125K BTU DOE Capacity, 94K BTU Net IBR Capacity.
3% Buy This
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$3,128.40
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Weil-McLain CGi-6-PIN - 135K BTU - 84.0% AFUE - Hot Water Gas Boiler - Power Vent
Model: 381359008
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 158k BTU Gross Input, 135k BTU DOE Capacity, 117k BTU Net IBR Capacity. Includes Circulator.
3% Buy This
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$2,619.99
Only 1 In-Stock
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Weil-McLain CGa-4-PIDL - 85K BTU - 84.0% AFUE - Hot Water Propane Boiler - Chimney Vent
Model: 381359088
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 100k BTU Gross Input, 85k BTU DOE Capacity, 74k BTU Net IBR Capacity. Includes Circulator.
3% Buy This
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$2,026.00
In-Stock
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2% Check Discount
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Weil-McLain CGa-7-PIDN - 170K BTU - 84.0% AFUE - Hot Water Gas Boiler - Chimney Vent
Model: 381359080
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 200k BTU Gross Input, 170k BTU DOE Capacity, 148k BTU Net IBR Capacity. Includes Circulator.
3% Buy This
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$3,061.00
In-Stock
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2% Check Discount
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Crown Boiler Bermuda - 107K BTU - 82.1% AFUE - Steam Propane Boiler - Chimney Vent
Model: BSI172ELPZZPSU
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 172K BTU Gross Input, 142K BTU DOE Capacity, 107K BTU Net IBR Capacity.
2% Buy This
(3)
$3,050.00
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2% Check Discount
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Buderus GC144/4 - 87K BTU - 85.0% AFUE - Hot Water Gas Boiler - Chimney Vent
Model: 7738503408
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 103K BTU Gross Input, 87K BTU DOE Capacity, 76K BTU Net IBR Capacity. Includes Circulator.
2% Buy This
(2)
$2,199.00
Backordered
Est. Ship Date Jan 19
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Crown Boiler Bermuda - 149K BTU - 82.2% AFUE - Steam Gas Boiler - Chimney Vent
Model: BSI241ENPZZPSU
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 241K BTU Gross Input, 199K BTU DOE Capacity, 149K BTU Net IBR Capacity.
2% Buy This
(1)
$3,249.05
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Burnham IN4PVNI - 65K BTU - 82.2% AFUE - Steam Gas Boiler - Power Vent - Packaged with Trim
Model: IN4PVNI-M2
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 105K BTU Gross Input, 87K BTU DOE Capacity, 65K BTU Net IBR Capacity.
2% Buy This
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$2,962.00
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Burnham Series 2 - 145k BTU - 84% AFUE - Hot Water Gas Boiler - Chimney Vent
Model: 206EN-T0
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Included Taco Circulator and LWCO. Ratings: 172K BTU Gross Input, 145K BTU DOE Capacity, 126K BTU Net IBR Capacity.
2% Buy This
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$2,693.00
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Weil-McLain CGi-5-PIL - 102K BTU - 84.0% AFUE - Hot Water Propane Boiler - Power Vent
Model: 381359020
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 119k BTU Gross Input, 102k BTU DOE Capacity, 89k BTU Net IBR Capacity. Includes Circulator.
2% Buy This
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$2,459.99
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2% Check Discount
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Weil-McLain CGa-3-PIDN - 56K BTU - 84.0% AFUE - Hot Water Gas Boiler - Chimney Vent
Model: 381359072
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 67k BTU Gross Input, 56k BTU DOE Capacity, 49k BTU Net IBR Capacity. Includes Circulator.
2% Buy This
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$1,820.62
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Weil-McLain EG-65-S-PIDN - 157K BTU - 83.0% AFUE - Steam Gas Boiler - Chimney Vent
Model: 118654300
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Disassembled. Ratings: 250K BTU Gross Input, 209K BTU DOE Capacity, 157K BTU Net IBR Capacity.
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$4,192.20
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Weil-McLain EG-75-S-PIDN - 185K BTU - 82.4% AFUE - Steam Gas Boiler - Chimney Vent
Model: 118754300
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Disassembled. Ratings: 299K BTU Gross Input, 247K BTU DOE Capacity, 185K BTU Net IBR Capacity.
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$4,239.95
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Burnham IN5 - 86K BTU - 82.0% AFUE - Steam Gas Boiler - Chimney Vent - Packaged with Trim
Model: PIN5SNI-ME2
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 140K BTU Gross Input, 115K BTU DOE Capacity, 86K BTU Net IBR Capacity.
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$3,199.00
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Buderus GC144/3 - 62K BTU - 85.0% AFUE - Hot Water Gas Boiler - Chimney Vent
Model: 7738503407
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 74K BTU Gross Input, 62K BTU DOE Capacity, 54K BTU Net IBR Capacity. Includes Circulator.
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$1,999.00
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Crown Boiler Aruba 5 - 117K BTU - 84% AFUE - Hot Water Propane Boiler - Chimney Vent
Model: AWR140BLST3PSU
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 Taco Circulator.
1% Buy This
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$2,161.81
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Free Shipping & Lift Gate
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
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2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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Crown Boiler Bermuda - 43K BTU - 81.9% AFUE - Steam Gas Boiler - Chimney Vent
Model: BSI069ENPZZPSU
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 69K BTU Gross Input, 57K BTU DOE Capacity, 43K BTU Net IBR Capacity.
1% Buy This
(1)
$2,099.99
Factory-Direct
Free Shipping & Lift Gate
×
Free Shipping & Lift Gate
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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Crown Boiler Bermuda - 64K BTU - 82.0% AFUE - Steam Gas Boiler - Chimney Vent
Model: BSI103ENPZZPSU
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 103K BTU Gross Input, 85K BTU DOE Capacity, 64K BTU Net IBR Capacity.
1% Buy This
(1)
$2,300.00
Factory-Direct
Free Shipping & Lift Gate
×
Free Shipping & Lift Gate
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
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