How to Pick the Perfect Boiler
At the heart of every boiler heating system is the boiler itself. It's responsi...
Local Pickup FAQ's
Hover to zoom
1 Of 5
Viessmann Vitodens 100 - 125K BTU - 95% AFUE - Combi Boiler - Direct Vent
Model:
B1KA-125
+
Share This Product
Recommended Accessories
Expert Recommended Accessories
Selected by Ken, our Expert
Required Accessories
9
These accessories are required to properly setup/install this product.
Optional Accessories
10
Features
- High Efficiency Heating and Hot Water
- The Viessmann Vitodens 100 combi boiler combines space heating and domestic hot water production while maintaining an impressive efficiency rating of 95% AFUE.
- Inox-Radial Heat Exchanger
- The Vitodens 100 boiler features a unique and highly efficient Inox-Radial heat exchanger designed and manufactured by Viessmann. Additionally, this self-cleaning heat exchanger contributes to the Vitodens's long service life and dependable performance.
- Installation and Service Flexibility
- The Vitodens 100 was designed for ease of installation and maintenance with all bottom pipe connections, accessible service components, fuel flexibility and multiple venting options.
- Touchscreen Control
- With an easy-to-use touchscreen control, the backlit LCD display features advanced programming options so you can easily set the boiler to your liking.
- Compact Size
- For the amount of power harnessed within the Vitodens 100 unit, you wouldn't expect such a small package. Perfect for installations in tight spaces, the Vitodens 100 doesn't need clearance to combustibles and features low-noise operation.
Viessmann offers a comprehensive range of home comfort products that sets the standards for sustainability and efficiency. The Viessmann Vitodens 100 Combi Boiler was designed for powerful domestic hot water and space heating while remaining reliably efficient. Equipped with state-of-the-art Viessmann radial heat exchangers and cylinder burners, the entire Vitodens lineup boasts a 95% AFUE rating. The Vitodens 100 features a compact design and quiet operation, making it the ideal boiler for small spaces. With versatile venting options and user-friendly controls, the Vitodens 100 is a favorite among professionals and homeowners alike.
Specifications
B1KA-125
General Information
Product Line
Vitodens
Medium
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
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
Combustion Type
Condensing appliances use leftover thermal energy from combustion gases to heat water in a secondary heat exchanger, resulting in higher efficiency and lower exhaust temperature.
Condensing
Vent Type
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 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
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
10000 Feet
Assembly Type
Packaged
Includes Pump
Yes
Gas Conversion Kit
Included
Performance
AFUE
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 %
Maximum Input Capacity
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.
125000 BTU
Minimum Input Capacity
21000 BTU
DOE Heating Capacity
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.
116000 BTU
Net I=B=R Capacity
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.
101000 BTU
Ultra Low NOx Emissions
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
No
Low NOx Emissions
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. Learn More
No
Turndown Ratio
6:1
Electrical Data
Voltage
115 Volts
Phase
1
Frequency
60 Hz
Dimensions
Flue Connection Size
2 Inches
Gas Connection Size
3/4 Inch
Boiler Supply
3/4 Inch
Boiler Return
3/4 Inch
Product Height
30 1/8 Inches
Product Width
15 3/4 Inches
Product Depth
15 3/4 Inches
Product Weight
90 Pounds
Shipping Weight
99 Pounds
Certifications
CSA Listed
Yes
Energy Star Listed
Yes
ASME Certified
Yes
AHRI Certified
Yes
AHRI Reference Number
10594298
Warranty Information
Parts Warranty
Parts Warranty
A warranty is a safeguard from defects in manufacturing and can vary in length and terms. Some manufacturers require registration for extended warranty benefits, be sure to check out features and the warranty document. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
2 Years
Heat Exchanger Warranty
10 Years
Reviews
Viessmann B1KA-125 Reviews & Ratings
Be the First to Write a Review
Do you own this product?
Please share your insights with fellow shoppers.
Please share your insights with fellow shoppers.
How-To Articles
Five Ways to Improve Boiler Efficiency
When purchasing a new boiler for your home, efficiency is the name of the game....
Hydronic System Accessory Guide
How warm does a coat keep you without gloves and a hat? Accessories are sometim...
eComfort How-To Library
Articles, Tips and Buying Guides from Our Experts
Manuals
Ask A Question!
*Required Fields
+
Thank You For Submitting Your Question
Your submission has been sent successfully. Please give our experts up to two business days to respond.
Media Gallery
Viessmann Vitodens 100 - 125K BTU - 95% AFUE - Combi Boiler - Direct Vent
Customer Review Images
