Gas Hot Water 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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Fuel Type Learn More
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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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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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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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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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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Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 180K BTU Gross Input, 169K BTU DOE Capacity, 147K BTU Net IBR Capacity. Includes Taco Circulator.
Item#: 103078
Brand: Crown Boiler Co.
Sale: $1,780.00
On Sale Through 06/24
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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 Taco Circulator.
Item#: 103097
Brand: Crown Boiler Co.
$3,109.00
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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 Taco Circulator.
Item#: 103100
Brand: Crown Boiler Co.
$3,938.00
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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 Taco Circulator.
Item#: 103101
Brand: Crown Boiler Co.
$3,915.00
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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.
Item#: 108280
Model#: 381359088
Brand: Weil-McLain
$2,898.00
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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.
Item#: 109177
Model#: 381359022
Brand: Weil-McLain
$4,034.00
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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#: 109195
Model#: 381359004
Brand: Weil-McLain
$3,204.00
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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#: 109201
Model#: 381359018
Brand: Weil-McLain
$3,204.00
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Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 94.5K BTU Gross Input, 81K BTU DOE Capacity, 70K BTU Net IBR Capacity. Includes Circulator.
Item#: 109816
Brand: Crown Boiler Co.
$3,014.00
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Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 68K BTU Maximum Input Capacity, 57K BTU DOE Capacity, 50K BTU Net IBR Capacity.
Item#: 111065
Brand: ProSelect Force Boilers
$1,905.00
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Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 272K BTU Maximum Input Capacity, 227K BTU DOE Capacity, 197K BTU Net IBR Capacity.
Item#: 111067
Brand: ProSelect Force Boilers
$3,173.00
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Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 102K BTU Maximum Input Capacity, 85K BTU DOE Capacity, 74K BTU Net IBR Capacity.
Item#: 111068
Brand: ProSelect Force Boilers
$2,103.00
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Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 150K BTU Gross Input, 139K BTU DOE Capacity, 121K BTU Net IBR Capacity. Includes Circulator.
Item#: 124140
Model#: 383900174
Brand: Weil-McLain
$3,941.00
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Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 199K BTU Gross Input, 184K BTU DOE Capacity, 160K BTU Net IBR Capacity. Includes Circulator.
Item#: 124900
Model#: 383900179
Brand: Weil-McLain
$4,089.00
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Sale: $1,729.00
On Sale Through 06/24
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Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 101K BTU Gross Input, 89K BTU DOE Capacity, 79K BTU Net IBR Capacity. Includes Circulator.
Item#: 37392
Model#: ZWB28-3A
Brand: Bosch Thermotechnology
$3,072.00
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Floor Mounted, Cast Iron Condensing Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 140K BTU Gross Input, 130K BTU DOE Capacity, 113K BTU Net IBR Capacity. Includes Circulator.
Item#: 49648
Model#: 382200612
Brand: Weil-McLain
$5,149.00
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Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 100K BTU Gross Input, 92K BTU DOE Capacity, 80K BTU Net IBR Capacity. Includes Circulator.
Item#: 82300
Model#: NRCB180DV-LP
Brand: Noritz
$2,587.88
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Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 199K BTU Gross Input, 184K BTU DOE Capacity, 159K BTU Net IBR Capacity. Includes Circulator.
Item#: 102842
Model#: INS199C
Brand: Triangle Tube
$2,854.00
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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 Taco Circulator.
Item#: 103092
Brand: Crown Boiler Co.
$2,584.00
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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 Taco Circulator.
Item#: 103095
Brand: Crown Boiler Co.
$2,724.00
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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 Taco Circulator.
Item#: 103103
Brand: Crown Boiler Co.
$4,219.00
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Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 136K BTU Maximum Input Capacity, 114K BTU DOE Capacity, 99K BTU Net IBR Capacity.
Item#: 111071
Brand: ProSelect Force Boilers
$2,299.00
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Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 101K BTU Gross Input, 89K BTU DOE Capacity, 79K BTU Net IBR Capacity. Includes Circulator.
Item#: 37393
Model#: ZBR28-3
Brand: Bosch Thermotechnology
$3,394.00
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