Burnham K2WT-080B-6T00
Burnham K2WT-080B-6T00
Burnham K2WT-080B-6T00
Burnham K2WT-080B-6T00
Hover to zoom
1 Of 5
Burnham K2WT-080B-6T00
Burnham K2WT-080B-6T00
Burnham K2WT-080B-6T00

Burnham K2 - 80k BTU - 95% AFUE - Hot Water Gas Boiler - Direct Vent



Write A Review
Product Discontinued
Sorry, this product is no longer available.
Burnham K2 - 80k BTU - 95% AFUE - Hot Water Gas Boiler - Direct Vent
Burnham K2 - 80k BTU - 95% AFUE - Hot Water Gas Boiler - Direct Vent
Model: K2WT-080B-6T00
Product Discontinued
How-To Articles

Recommended Accessories

eComfort expert image
Expert Recommended Accessories Selected by Ken, our Expert
Required Accessories 9
These accessories are required to properly setup/install this product.
Optional Accessories 10


    Burnham continues to be on the forefront of home heating technology. By constantly working to improve the efficiency of their boilers, they are able to pass the savings directly to the homeowner. The K2WT-080B-6T00 is the next model in a history of state-of-the-art, economical machines. The K2 line improves upon Burnham's condenser technology, allowing for optimal heating performance at up to 95% AFUE efficiency. The stainless steel body and included wall mount system allow for easy installation and long-term reliability. The K2 line also introduces the Sage2.3™ control system, providing high efficiency heating right out of the box, as well as an easy to use touch screen interface with intuitive menus and graphs. Burnham has strived to deliver the best, most efficient machines for residential heating, and the K2 continues that mission.
  • Sage2.3 Control System
  • The Sage2.3 system has a simple touchscreen interface built into the boiler. The system provides step-by-step instructions for changing settings and running system diagnostics, making the K2 one of the most user-friendly boilers on the market.
  • Built to be Efficient
  • The K2 line is designed to be easy to service, allowing for quick, efficient maintenance. Quicker maintenance combined with ease of installation keeps initial and year-to-year costs down, saving money over the lifetime of the boiler.
  • Manage Multiple Boilers
  • The K2 boiler can be linked with other boilers, automatically communicating between each other to serve even the largest of spaces and efficiently heat your home. Using smart features, boilers work in tandem to share the load between all boilers.
  • High Altitude Boilers
  • Due to Burnham's condensing technology, the K2 model suffers little to no efficiency loss at higher altitudes. With an easily adjustable option built into the boiler, the K2 model can work at near maximum efficiency up to 10,000 feet.
  • Multiple Installation Options
  • The K2 model comes with a built-in wall mount allowing for flexibility in almost any installation situation. The K2's relatively small size and weight allow it to fit in nearly any space.
  • Product Includes
  • (1) Burnham K2WT-080B-6T00 K2 Hot Water Boiler
  • (1) Wall Mounting Kit
California residents see
Warning: This product can expose you to chemicals including Chromium (hexavalent compounds) which is known to the State of California to cause Developmental Harm.
For more information go to: www.p65Warnings.ca.gov


specs product image PID-58584
Product Category
Additional Model Numbers

K2-080, K2WT-080B-6T00

General Information
Product Line
Product Category
Medium Learn More
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 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.
Natural Gas
Combustion Type Learn More
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.
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.
Direct Vent
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.
Modulating/Staging Learn More
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
Mount Type
Minimum Altitude
0 Feet
Maximum Altitude
10100 Feet
Assembly Type
Includes Pump
AFUE Learn More
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 Learn More
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.
80000 BTU
Minimum Input Capacity
8000 BTU
DOE Heating Capacity Learn More
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.
74000 BTU
Net I=B=R Capacity Learn More
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.
64000 BTU
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. Learn More
Turndown Ratio
Electrical Data
120 Volts
60 Hz
Flue Connection Size
2 or 3 Inches
Supply Connection
1 Inch
Return Connection
1 Inch
Product Height
29 Inches
Product Width
17 Inches
Product Depth
16 3/16 Inches
Product Weight
100 Pounds
Shipping Weight
149 Pounds
Country of Origin
United States
Energy Star Listed
ASME Certified
AHRI Certified
AHRI Reference Number
Warranty Information
Parts Warranty Learn More
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
5 Years


Burnham K2WT-080B-6T00 Reviews & Ratings

How-To Articles

How to Pick the Perfect Boiler
How to Pick the Perfect Boiler
At the heart of every boiler heating system is the boiler itself. It's responsi...
A Break-Down of Boiler Fuel Options
A Break-Down of Boiler Fuel Options
In many homes around the world, a boiler is essential. A boiler can provide hea...
Hydronic System Accessory Guide
Hydronic System Accessory Guide
How warm does a coat keep you without gloves and a hat? Accessories are sometim...
eComfort How-To Library
eComfort How-To Library
Articles, Tips and Buying Guides from Our Experts


Media Gallery
Burnham K2 - 80k BTU - 95% AFUE - Hot Water Gas Boiler - Direct Vent
Burnham K2WT-080B-6T00
Burnham K2WT-080B-6T00
Burnham K2WT-080B-6T00
Burnham K2WT-080B-6T00
Customer Review Images