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Number of Zones Learn More
Number of Zones
A zone is a room or area within a building that has its own temperature control.
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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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Heating BTU
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Cooling BTU
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Capacity (Tons) Learn More
Capacity (Tons)
Tonnage, or tons of cooling, is a short hand method for describing the capacity of cooling equipment. One ton is equal to approximately 12 kBTU/hr.
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Maximum Number of Zones
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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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Efficiency (%)
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Learn More About Williams 9929acw-sale-badge
Williams Vent Starter Kit
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Williams - 9929 - Vent Starter Kit - For Williams' Top-Vent Furnaces
Item#: 71160
Model#: 9929
Brand: Williams
$290.00
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Williams Vent Starter Kit
Learn More About Ecostyle ECS361622CVacw-sale-badge
Ecostyle - 4,240 BTU - Hot Water Panel Radiator - 36"H x 16"W - White
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Ecostyle - B-36.16 ECO - 4,240 BTU with a boiler supply temperature of 180 degrees F - Hydronic Panel Radiator - 36"H x 16"W - White
Item#: 24166
Model#: ECS361622CV
Brand: Ecostyle
$504.00
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Ecostyle - 4,240 BTU - Hot Water Panel Radiator - 36"H x 16"W - White
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Ecostyle - 6,362 BTU - Hot Water Panel Radiator - 36"H x 24"W - White
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Ecostyle - B-36.24 ECO - 6,362 BTU with a boiler supply temperature of 180 degrees F - Hydronic Panel Radiator - 36"H x 24"W - White
Item#: 24167
Model#: ECS362422CV
Brand: Ecostyle
Sale: $503.00
On Sale Through 06/09
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Ecostyle - 6,362 BTU - Hot Water Panel Radiator - 36"H x 24"W - White
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Ecostyle - 5,421 BTU - Hot Water Panel Radiator - 16"H x 40"W - White
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Ecostyle - B-16.40 ECO - 5,421 BTU with a boiler supply temperature of 180 degrees F - Hydronic Panel Radiator - 16"H x 40"W - White
Item#: 24172
Model#: ECS164022CV
Brand: Ecostyle
$340.00
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Ecostyle - 5,421 BTU - Hot Water Panel Radiator - 16"H x 40"W - White
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Ecostyle - 6,504 BTU - Hot Water Panel Radiator - 16"H x 48"W - White
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Ecostyle - B-16.48 ECO - 6,504 BTU with a boiler supply temperature of 180 degrees F - Hydronic Panel Radiator - 16"H x 48"W - White
Item#: 24173
Model#: ECS164822CV
Brand: Ecostyle
$563.00
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Ecostyle - 6,504 BTU - Hot Water Panel Radiator - 16"H x 48"W - White
Learn More About Williams 5002921Aacw-sale-badge
Williams - 50K BTU - Fireplace-Look Room Heater - LP - 68% AFUE - With Blower
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Item#: 71185
Model#: 5002921A
Brand: Williams
$2,036.00
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Williams - 50K BTU - Fireplace-Look Room Heater - LP - 68% AFUE - With Blower
Learn More About Williams 6508632acw-sale-badge
Williams Forsaire - 65k BTU - Gas Top-Vent Wall Furnace - 76% AFUE - Standing Pilot
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Item#: 71213
Model#: 6508632
Brand: Williams
$2,413.00
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Williams Forsaire - 65k BTU - Gas Top-Vent Wall Furnace - 76% AFUE - Standing Pilot
Learn More About Reznor UDXC-60acw-sale-badge
Reznor UDXC - 60,000 BTU - Power Vented Gas Fired Unit Heater - Low Static Axial Fan - NG - TCORE2® Heat Exchanger - LP Convertible
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Reznor - UDXC-60 - 60,000 BTU - Gas Fired Unit Heater - Power Vented - Natural Gas - Aluminized Heat Exchanger - 769 CFM - 115V
Item#: 157233
Model#: UDXC-60
Brand: Reznor
$1,198.00
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Reznor UDXC - 60,000 BTU - Power Vented Gas Fired Unit Heater - Low Static Axial Fan - NG - TCORE2® Heat Exchanger - LP Convertible
Learn More About Reznor UDXC-100acw-sale-badge
Reznor UDXC - 105,000 BTU - Power Vented Gas Fired Unit Heater - Low Static Axial Fan - NG - TCORE2® Heat Exchanger - LP Convertible
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Reznor - UDXC-100 - 105,000 BTU - Gas Fired Unit Heater - Power Vented - Natural Gas - Aluminized Heat Exchanger - 1,345 CFM - 115V
Item#: 157235
Model#: UDXC-100
Brand: Reznor
$1,475.00
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Reznor UDXC - 105,000 BTU - Power Vented Gas Fired Unit Heater - Low Static Axial Fan - NG - TCORE2® Heat Exchanger - LP Convertible
Learn More About Caleffi 573002Aacw-sale-badge
Caleffi Auto Fill Combo Automatic Boiler Fill Valve with Backflow Preventer, 1/2" FNPT Inlet x 1/2" FNPT Outlet
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Caleffi AutoFIll Combo Automatic Boiler Fill Valve with Backflow Preventer, Pressure Indicator, 1/2" FNPT Inlet x 1/2" NPT Female Outlet
Item#: 25898
Model#: 573002A
Brand: Caleffi
$159.00
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Caleffi Auto Fill Combo Automatic Boiler Fill Valve with Backflow Preventer, 1/2" FNPT Inlet x 1/2" FNPT Outlet
Learn More About Modine HD75AS0121acw-sale-badge
Modine Hot Dawg HD - 75,000 BTU - Unit Heater - LP - 80% Thermal Efficiency - Power Vented - Aluminized Steel Heat Exchanger
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Modine - HD75AS0121 - 75,000 BTU - Hot Dawg HD Gas Fired Unit Heater - Single-Stage Liquid Propane Burner - 80% Thermal Efficiency - Power Vented - Aluminized Steel Heat Exchanger - Propeller Driven - 115V/60Hz/1 Phase
Item#: 48435
Model#: HD75AS0121
Brand: Modine
$1,134.00
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Modine Hot Dawg HD - 75,000 BTU - Unit Heater - LP - 80% Thermal Efficiency - Power Vented - Aluminized Steel Heat Exchanger
Learn More About Goodman GM9S960803BNacw-sale-badge
Goodman GM9S96 - 80k BTU - Gas Furnace - 96% AFUE
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High Efficiency Upflow/Horizontal Blower with 1200 Max CFM. Natural Gas with Low NOx Emissions. 17.5 Cabinet Width.
Item#: 117114
Model#: GM9S960803BN
Brand: Goodman
Originally $1,830.00
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Goodman GM9S96 - 80k BTU - Gas Furnace - 96% AFUE
Learn More About Ecostyle ECS241622CVacw-sale-badge
Ecostyle - 3,037 BTU - Hot Water Panel Radiator - 24"H x 16"W - White
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Ecostyle - B-24.16 ECO - 3,037 BTU with a boiler supply temperature of 180 degrees F - Hydronic Panel Radiator - 24"H x 16"W - White
Item#: 24158
Model#: ECS241622CV
Brand: Ecostyle
$265.00
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Ecostyle - 3,037 BTU - Hot Water Panel Radiator - 24"H x 16"W - White
Learn More About Modine HD125AS0121acw-sale-badge
Modine Hot Dawg HD - 125,000 BTU - Unit Heater - LP - 80% Thermal Efficiency - Power Vented - Aluminized Steel Heat Exchanger
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Modine - HD125AS0121 - 125,000 BTU - Hot Dawg HD Gas Fired Unit Heater - Single-Stage Liquid Propane Burner - 80% Thermal Efficiency - Power Vented - Aluminized Steel Heat Exchanger - Propeller Driven - 115V/60Hz/1 Phase
Item#: 48419
Model#: HD125AS0121
Brand: Modine
$1,419.00
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Modine Hot Dawg HD - 125,000 BTU - Unit Heater - LP - 80% Thermal Efficiency - Power Vented - Aluminized Steel Heat Exchanger
Learn More About Modine PDP150AE0130acw-sale-badge
Modine PDP - 150,000 BTU - Unit Heater - NG - 83% Thermal Efficiency - Power Vented - Aluminized Steel Heat Exchanger - Propeller
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Modine - PDP150AE0130 - 150,000 BTU - Gas Fired Unit Heater - Single-Stage Natural Gas Burner - 80% Thermal Efficiency - Power Vented - Aluminized Steel Heat Exchanger - Propeller Driven Air Propulsion - 115V/60Hz/1 Phase*
Item#: 48527
Model#: PDP150AE0130
Brand: Modine
$1,711.00
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Modine PDP - 150,000 BTU - Unit Heater - NG - 83% Thermal Efficiency - Power Vented - Aluminized Steel Heat Exchanger - Propeller
Learn More About Modine PDP200AE0185acw-sale-badge
Modine PDP - 200,000 BTU - Unit Heater - LP - 83% Thermal Efficiency - Power Vented - Aluminized Steel Heat Exchanger - Propeller
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Modine - PDP200AE0185 - 200,000 BTU - Gas Fired Unit Heater - Single-Stage Liquid Propane Burner - 80% Thermal Efficiency - Power Vented - Aluminized Steel Heat Exchanger - Propeller Driven Air Propulsion - 115V/60Hz/1 Phase*
Item#: 48533
Model#: PDP200AE0185
Brand: Modine
$1,816.00
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Modine PDP - 200,000 BTU - Unit Heater - LP - 83% Thermal Efficiency - Power Vented - Aluminized Steel Heat Exchanger - Propeller
Learn More About Weil-McLain 590921612acw-sale-badge
Weil-McLain WTGO - Tankless Water Heater Coil for WTGO-3, WTGO-4, WTGO-5 and WTGO-6
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Weil-McLain - Tankless Water Heater Coil - For WTGO-3, WTGO-4, WTGO-5, and WTGO-6 Hot Water Boilers - MPN: 590921612
Item#: 50071
Model#: 590921612
Brand: Weil-McLain
$323.00
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Weil-McLain WTGO - Tankless Water Heater Coil for WTGO-3, WTGO-4, WTGO-5 and WTGO-6
Learn More About Buderus 7750102606acw-sale-badge
Buderus Model 22 - 3,511 BTU - Hot Water Panel Radiator - 20" H x 24" W x 4" D
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Buderus - 7750102606 - 3,511 BTU - Hydronic Panel Radiator - 20" Height x 24" Width x 4" Depth
Item#: 79632
Model#: 7750102606
Brand: Buderus
$373.00
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Buderus Model 22 - 3,511 BTU - Hot Water Panel Radiator - 20" H x 24" W x 4" D
Learn More About Modine PDP300AE0130acw-sale-badge
Modine PDP - 300,000 BTU - Unit Heater - NG - 83% Thermal Efficiency - Power Vented - Aluminized Steel Heat Exchanger - Propeller
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Modine - PDP300AE0130 - 300,000 BTU - Gas Fired Unit Heater - Single-Stage Natural Gas Burner - 80% Thermal Efficiency - Power Vented - Aluminized Steel Heat Exchanger - Propeller Driven Air Propulsion - 115V/60Hz/1 Phase*
Item#: 48543
Model#: PDP300AE0130
Brand: Modine
$2,703.00
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Free Lift Gate
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Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
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Modine PDP - 300,000 BTU - Unit Heater - NG - 83% Thermal Efficiency - Power Vented - Aluminized Steel Heat Exchanger - Propeller