• DXL Front/Control Side View

    DXL Front/Control Side View

  • DXL Right Side View

    DXL Right Side View

  • DXL - Back View

    DXL - Back View

  • DXL - Left Side View

    DXL - Left Side View

  • DXL - Front View

    DXL - Front View

  • DXL - Front View, Panel Removed

    DXL - Front View, Panel Removed

DXL Series

DXL Series

Dunkirk's new DXL 2012 DOE Compliant gas-fired, hot-water boiler has an advanced Fuel Smart Hydrostat Control and offers up to 83.5% AFUE.

The DXL's 3 in 1 Control features:

  • Temperature limit with LED display and easy dial settings. Diagnostic and function indicator lights.
  • Low Water Cut-Off (LWCO), protects the boiler from damaging low water conditions.
  • Boiler Reset, lowers the boiler temperature to save fuel by turning on the burner only when needed. Setup is quick with no need to install an outdoor sensor; just dial in the number of heating zones.

The DXL is an atmospheric chimney vent boiler with Integral Draft Diverter. The Integral Draft Hood reduces the overall height and footprint of the boiler making it ideal for low clearance/space limited installations.

The DXL also features a Cast to Last 20 Year Non-Prorated Warranty.


  • Efficiency: Mid-Efficiency
  • Capacity: 50 - 75 - 100 - 125 - 150 - 170 - 200 MBH
  • Heat Exchanger: Cast Iron
  • Combustion: Atmospheric
  • Venting: Chimney Vent
  • Boiler Type: Hot Water
  • Boiler Control Module: Recessed Fuel Smart Hydrostat Temperature Limit, LWCO and Boiler Reset Control with Circulator Relay and Domestic Hot Water Input Override.
  • User Display Interface: Temperature LED display with dial-type settings and diagnostic indicator lights.
  • Heat Exchanger: Cast Iron Sections with Cast Iron Push Nipples
  • 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


  • Central Heating Pump (Taco, Grundfos, or Less Pump)
  • LP Conversion Kit
  • Combustible Floor Plate
  • Fill-Trol

Documents / Resources

Product Testimonials

  • It was packaged very well so no damage when it was brought in. Nice color so when it gets older it will still look good!! Quiet running and the energy features on this boiler this is great

    Lake View, NY

    Channahon, IL
  • very satisfied with product

    Tonawanda, NY
  • Very good quality at economical price. Keep up the good work.

    Sauquoit, NY
  • The last boiler this one replaced was a Dunkirk that lasted almost 45 years!

    Lockport, NY
  • Product was equivalent of much higher priced units at a much lower price

    Mantua, NJ
  • Very quality unit. Very quiet and works very well.

    Bellevue, OH
  • This is my second house and second Dunkirk boiler unit. First one worked like a champ. Nice and compact and love the electric damper and LED temperature read out.

    Erie, PA
  • this may sound crazy but its a beautiful boiler. Much more efficient than my old heater. Used heater for first time since change of weather & works perfectly.

    Atlantic City, NJ
  • Yes, I have previous Dunkirk boilers. Giving me peace of mind when we travel out of town.

    William Zaborowski, Homeowner
    Newark, NY