• Boiler Part Kit

DXL-K Series

DXL-K Series

The DXL-K is a gas-fired boiler with quiet and highly efficient operation. It’s energy saving features include the electronic ignition system and motorized vent damper.

The internal Hydrolevel control adjusts the water temperature based on your heating system demand which further reduces heating costs. The Built-in low water cutoff (LWCO) protects the boiler from potentially dangerous low water levels.

The DXL-K offers more installation flexibility with water and gas piping options available out the left or right sides of the boiler.
2021 DOE (Department of Energy) Standard Compliant.
7 Models available offering inputs from 59 - 235 MBH.

  • Proven Cast Iron Heat Exchanger Design
  • Features a dependable cast iron heat exchanger with dry leg end sections.
  • Easy to Service Burners
  • Features a pull-out burner drawer and removable burner tube tray for quick access for service.
  • Easy to Install Low Profile Draft Diverter
  • Reduces installation height by up to 30” when compared to models with external draft diverter hoods.
  • 20 Year Non-Prorated Limited Warranty
  • Innovative American Manufacturing


  • Efficiency: Mid-Efficiency
  • Capacity: 59, 92.5, 120, 149, 175, 205, 235 MBH
  • Heat Exchanger: Cast Iron
  • Combustion: Atmospheric
  • Venting: Chimney Vent
  • Boiler Type: Hot Water
  • Boiler Control Module: Internal Hydrolevel Operating Control, control adjusts the water temperature based on the heating system demand to reduce your heating costs. Built-in Low Water Cutoff (LWCO) protects the boiler from potentially dangerous low water conditions.
  • User Display Interface: Temperature LED display with dial-type settings and diagnostic indicator lights.
  • Heat Exchanger: Cast Iron Sections
  • Combustion: Completely Installed and Wired Gas Control System with Burners and Manifold consisting of Stainless Steel Burners, Automatic Redundant Combination Gas Valve, 24 Volt Intermittent Pilot Control, Continuous Retry 100% Shut-Off, Combination Pilot Burner/Electrode/Sensor.
  • Electrical: 24v Transformer
  • Safety: Flame Roll-Out Safety Shut-Off and Manual Reset Blocked Vent Safety Shut-Off.
  • Other
    • Boiler Jacket
    • Integral Draft Diverter
    • Combination Temperature/Pressure Gauge
    • Circulator Pump
    • 3/4" Drain Valve
    • ASME Relief Valve


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Documents / Resources

Product Testimonials

  • Had a 25 yr old boiler I never had an issue with until my hard water built up. Very satisfied with length of problem free heat.

    Theresa Haefele
    Cofu, NY
  • It's our 2nd Dunkirk boiler, the 1st lasted 20 yrs.. The new one is Definitely an upgrade in efficiency.

    Lisa Brennan
    Grand Island, NY
  • As an installing contractor for many years, Dunkirk has always had great quality and has provided exceptionable products to work with.

    It’s an American made company that we are proud to put our name behind.

    Jeffrey Mashewske
    Newark, NY
  • Quiet and small.

    Steve Koziol
    East Aurora, NY
  • Known for upper quality and replaces Dunkirk 130 BTU unit.  

    Manual helpful for homeowner to understand.

    Derek Ellis
    Ottawa, IL
  • it's a well made boiler and reliable

    Jose Henriquez
    Silver Spring. MD
  • It is real trustworthy unit.

    Silver Spring, MD