Dunkirk EXB510050210203 Dunkirk EXB5100 Excelsior Oil 3-Pass Boiler w/ Taco Pump, Chimney-Vented, Riello Burner,140 MBH In, 122 MBH Out - EXB510050210203

Dunkirk EXB5100 Excelsior Oil 3-Pass Boiler w/ Taco Pump, Chimney-Vented, Riello Burner,140 MBH In, 122 MBH Out - EXB510050210203

SKU: 388949
$ 2,117.00 / ea
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Save 26% · Retail: $2,847.00

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Dunkirk EXB5100 Excelsior Oil 3-Pass Boiler W/ Taco Pump, Chimney-vented, Riello Burner,140 Mbh In, 122 Mbh Out - EXB510050210203

SKU: 388949
$2,117.00/ea


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About the Dunkirk EXB5100 Excelsior Oil 3-Pass Boiler w/ Taco Pump, Chimney-Vented, Riello Burner,140 MBH In, 122 MBH Out - EXB510050210203

The boiler seamlessly integrates state-of-the-art technology with a design that prioritizes user-friendliness, ensuring highly efficient water heating!


If you're searching for a boiler that is easy to install and maintain, your solution lies in the Dunkirk EXB510050210203 EXB5135 oil 3-pass boiler. It has a high-limit control, LED display, and straightforward dial settings, ensuring a trouble-free installation process. Maintenance is simple with its spacious flue ways, a flexible oil line, and a swing door that provides easy access. This unit exceeds expectations with its streamlined design, emphasizing efficiency and user convenience. Additional features, such as a sight glass and test port, contribute to a maintenance experience that is straightforward and hassle-free.


Efficiency is a standout feature, boasting an AFUE rating of 87% coupled with Energy-Star certification. The unit's firing rate of 105 ensures optimal performance. Moreover, the boiler's low-mass design aligns with eco-friendly principles, minimizing standby losses and adhering to contemporary environmental standards. 


For added assurance, the boiler offers a 20-year non-prorated limited warranty, a testament to its durability and reliability. Personalize your heating system with options like a manual reset high limit featuring plug-in Molex connectors, and explore the added convenience of direct vent compatibility.


Dunkirk, a respected name in home heating solutions since 1928, remains dedicated to innovation, efficiency, and dependability. Elevate your hot water system with the Dunkirk Excelsior EXB510050210203—an emblem of reliable performance. Secure yours today!


PlumbersStock is your go-to destination for all your heating and cooling needs, providing top-quality products alongside unparalleled expertise.

Manufacturer: Dunkirk
Product: Boiler
Color: Blue
Capacity: 4.3 Gallons
Electrical Voltage: 120VAC, 60Hz
Connection Size: 1-1/4"
Connection Type: NPT
Modus Operandi: Fuel Oil
Height: 31"
Width: 17-3/4"
Other Info: Taco Pump Included
  Riello Burner Included
Use: Hydronic Heating
BTU Rate: 140,000 BTU
Mpn # EXB510050210203
Weight 480.00 lbs.
  • Showcasing Effective Heat Conversion: The boiler attains an impressive efficiency of up to 87% AFUE and proudly boasts an Energy Star Certification.
  • Effortless High Limit Reset with Plug-and-Play Molex Connectors: Simplify and expedite maintenance procedures by efficiently performing manual high-limit resets using user-friendly plug-and-play Molex connectors.
  • Flexible Direct Venting Compatibility: Embrace adaptability and broaden installation possibilities with compatibility for direct venting, enhancing convenience and flexibility.
  • Precise Control with High Limit and LED Display: Attain accurate temperature regulation through the boiler's high limit control featuring an illuminating LED display, ensuring thorough and efficient heating.
  • Intuitive Dial Settings for Simple Customization: Program settings effortlessly with an intuitive dial, providing users with convenient control and seamless customization for an enriched experience.
  • Dynamic Boiler Water Temperature Reset: Optimize efficiency by dynamically adjusting water temperature based on heating demand, improving overall performance and energy utilization.
  • Enhanced Safety with Low Water Cut-off Functionality: Prioritize safety with an automatic system shutdown in the event of low water levels, mitigating potential damage and ensuring a secure operational environment.
  • Space-Efficient Design for Adaptable Installation: Benefit from the boiler's compact design, allowing for versatile installation in various spaces and optimizing spatial flexibility.
  • Customized Burners and Venting Configurations: Select from various burners and venting options to tailor the boiler to specific requirements, ensuring adaptability and optimal performance.
  • Exemplary American Craftsmanship: Immerse yourself in the innovative American craftsmanship of the boiler, highlighting a commitment to quality, reliability, and cutting-edge design.
  • Long-Term Reassurance: Experience lasting peace of mind with the substantial 20-year warranty accompanying this boiler, as evidence of its enduring durability and reliability. This warranty is a testament to the boiler's commitment to delivering reliable and long-lasting performance for years.

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