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Bosch Greenstar Combi 131 - ZBW35 - 117K BTU - 95.0% AFUE - Combi Gas Boiler - Direct Vent

Bosch Greenstar Combi 131 - ZBW35 - 117K BTU - 95.0% AFUE - Combi Gas Boiler - Direct Vent
Model: ZWB35-3
$3,699.00
$2,999.00
Only 2 In-Stock
Ships Thursday, Jan 25th
Free Shipping & 
Tax-Free (Except IL)
Free Lift Gate Service - 
Capacity (BTU/h)
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Only 2 In-Stock
Ships Thursday, Jan 25th
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*We currently CANNOT ship this product to Canada or any destination outside of the United States
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  • Product Description
  • 4
    Reviews
  • Product Q&A
  • Recommended Accessories
  • How-To Articles
  • Manuals
Product Description
+
Features
Features

    The Bosch greenstar boiler brings today's high efficiency technologies together in a single package. Astounding efficiency ratings can be achieved with the use of Bosch's condensing technology, squeezing every last BTU out of your home's gas supply. An included 3-speed Grundfos pump and a wide variety of pipe venting options allow the boiler to be installed in nearly any home imaginable. This boiler includes a domestic hot water coil, allowing the boiler to act as a tankless hot water heater as well as a hydronic boiler.

    Product Features

    Condensing Technology Improves Efficiency
    The ZWB35-3 is a condensing boiler, using the leftover energy in the boiler's flue exhaust to further heat your home. Keep your home warmer for less energy cost!

    Included DHW Coil
    This Bosch greenstar boiler contains an internal domestic hot water coil. This allows the boiler to function as a tankless hot water heater as well as a hydronic water boiler.

    Fully Modulating Fan
    The boiler includes a fully modulating fan to control the boiler's burning rate, allowing optimum efficiency to be achieved during a wide variety of outdoor conditions.

    Small Size and Low Installation Clearances
    Low installation clearances on all sides, wall mounting configuration, and small footprint translate into a boiler that can be installed almost anywhere.

Specifications
General Information
Product Line
Greenstar
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.
Hot Water
Fuel Type To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
Natural Gas
Combustion Type
Condensing
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.
Direct Vent
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.
Yes
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. Learn More
Modulating
Mount Type
Wall
Minimum Altitude
0 Feet
Maximum Altitude
6000 Feet
Includes Pump
Yes
Assembly Type
Packaged
Gas Conversion Kit
Included
Performance
Maximum Input Capacity 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.
131900 BTU
Minimum Input Capacity
36000 BTU
DOE Heating Capacity 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.
116700 BTU
Net I=B=R Capacity 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.
103000 BTU
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. Learn More
95 %
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. Learn More
Yes
Turndown Ratio
5:1
Electrical Data
Voltage
120 Volts
Phase
1
Frequency
60 Hz
Dimensions
Flue Connection Size
3 Inches
Gas Connection Size
0.75 Inches
Cold Water Inlet
0.75 Inches
Hot Water Outlet
0.75 Inches
Supply Connection
1 Inch
Return Connection
1 Inch
Product Height
33.5 Inches
Product Width
17.4 Inches
Product Depth
13.9 Inches
Product Weight
110.2 Pounds
Warranty Information
Parts Warranty A warranty is a safeguard from defects in manufacturing and can vary in length and terms. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
5 Years
Heat Exchanger Warranty
Limited Lifetime Years
Certifications
Country of Origin
United States
CSA Listed
Yes
ASME Certified
Yes
AHRI Certified
Yes
AHRI Reference Number
6603447
Features
Features

    The Bosch greenstar boiler brings today's high efficiency technologies together in a single package. Astounding efficiency ratings can be achieved with the use of Bosch's condensing technology, squeezing every last BTU out of your home's gas supply. An included 3-speed Grundfos pump and a wide variety of pipe venting options allow the boiler to be installed in nearly any home imaginable. This boiler includes a domestic hot water coil, allowing the boiler to act as a tankless hot water heater as well as a hydronic boiler.

    Product Features

    Condensing Technology Improves Efficiency
    The ZWB35-3 is a condensing boiler, using the leftover energy in the boiler's flue exhaust to further heat your home. Keep your home warmer for less energy cost!

    Included DHW Coil
    This Bosch greenstar boiler contains an internal domestic hot water coil. This allows the boiler to function as a tankless hot water heater as well as a hydronic water boiler.

    Fully Modulating Fan
    The boiler includes a fully modulating fan to control the boiler's burning rate, allowing optimum efficiency to be achieved during a wide variety of outdoor conditions.

    Small Size and Low Installation Clearances
    Low installation clearances on all sides, wall mounting configuration, and small footprint translate into a boiler that can be installed almost anywhere.

Specifications
General Information
Product Line
Greenstar
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.
Hot Water
Fuel Type To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
Natural Gas
Combustion Type
Condensing
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.
Direct Vent
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.
Yes
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. Learn More
Modulating
Mount Type
Wall
Minimum Altitude
0 Feet
Maximum Altitude
6000 Feet
Includes Pump
Yes
Assembly Type
Packaged
Gas Conversion Kit
Included
Performance
Maximum Input Capacity 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.
131900 BTU
Minimum Input Capacity
36000 BTU
DOE Heating Capacity 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.
116700 BTU
Net I=B=R Capacity 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.
103000 BTU
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. Learn More
95 %
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. Learn More
Yes
Turndown Ratio
5:1
Electrical Data
Voltage
120 Volts
Phase
1
Frequency
60 Hz
Dimensions
Flue Connection Size
3 Inches
Gas Connection Size
0.75 Inches
Cold Water Inlet
0.75 Inches
Hot Water Outlet
0.75 Inches
Supply Connection
1 Inch
Return Connection
1 Inch
Product Height
33.5 Inches
Product Width
17.4 Inches
Product Depth
13.9 Inches
Product Weight
110.2 Pounds
Warranty Information
Parts Warranty A warranty is a safeguard from defects in manufacturing and can vary in length and terms. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
5 Years
Heat Exchanger Warranty
Limited Lifetime Years
Certifications
Country of Origin
United States
CSA Listed
Yes
ASME Certified
Yes
AHRI Certified
Yes
AHRI Reference Number
6603447
Product Specs
+
Specifications
General Information
Product Line
Greenstar
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.
Hot Water
Fuel Type To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
Natural Gas
Combustion Type
Condensing
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.
Direct Vent
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.
Yes
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. Learn More
Modulating
Mount Type
Wall
Minimum Altitude
0 Feet
Maximum Altitude
6000 Feet
Includes Pump
Yes
Assembly Type
Packaged
Gas Conversion Kit
Included
Performance
Maximum Input Capacity 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.
131900 BTU
Minimum Input Capacity
36000 BTU
DOE Heating Capacity 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.
116700 BTU
Net I=B=R Capacity 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.
103000 BTU
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. Learn More
95 %
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. Learn More
Yes
Turndown Ratio
5:1
Electrical Data
Voltage
120 Volts
Phase
1
Frequency
60 Hz
Dimensions
Flue Connection Size
3 Inches
Gas Connection Size
0.75 Inches
Cold Water Inlet
0.75 Inches
Hot Water Outlet
0.75 Inches
Supply Connection
1 Inch
Return Connection
1 Inch
Product Height
33.5 Inches
Product Width
17.4 Inches
Product Depth
13.9 Inches
Product Weight
110.2 Pounds
Warranty Information
Parts Warranty A warranty is a safeguard from defects in manufacturing and can vary in length and terms. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
5 Years
Heat Exchanger Warranty
Limited Lifetime Years
Certifications
Country of Origin
United States
CSA Listed
Yes
ASME Certified
Yes
AHRI Certified
Yes
AHRI Reference Number
6603447
Reviews
(4)
+
Bosch Thermotechnology ZWB35-3 Reviews & Ratings
Product Q&A
+
Be the first to ask a question.
Recommended Accessories
+
How-To Articles
+
Manuals
+
 
 
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Bosch Greenstar Combi 131 - ZBW35 - 117K BTU - 95.0% AFUE - Combi Gas Boiler - Direct Vent
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