Hot Water Heating


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P-K MODU-FIRE Forced Draft Non-Condensing Boilers

Models: N750 (750 MBTU), N1000 (1000 MBTU), N1500 (1500 MBTU), N2000 (2000 MBTU), N2500 (2500 MBTU), N3000 (3000 MBTU)

The P-K MODU-FIRE Forced Draft boiler is a full modulation design that changes both fuel and air at a constant ratio to match boiler output to actual heat demand.

With a constant fuel to air ratio and smooth 5:1 turndown that can track varying loads down to 20% of rated capacity, efficient and clean combustion can be achieved across the entire firing range of the boiler.

All P-K MODU-FIRE® Forced Draft boilers now come standard with Harsco Industrial Patterson-Kelley’s NURO® control system. Advanced features such as cascade sequencing and building management system integration via MODBUS® protocol makes it easy to set up and manage P-K MODU-FIRE® Forced Draft boilers, even when used in a hybrid system design with P-K MACH® condensing boilers.

MODBUS® is a registered trademark owned by Schneider Automation Inc.


  • Small, modular configuration
  • Big output
  • Changes both fuel and air at a constant ratio to match boiler output to actual heat demand
  • Smooth 5:1 turndown can track varying loads down to 20% of rated capacity
  • Dynamic air density compensation
  • Eliminates short cycling in high variable speed pumping systems
  • First boiler of its kind to offer system oriented intelligence
  • Accurate firing rate feedback – analog output signal proportional to firing rate
  • Small diameter Category IV venting
  • Easy service construction
  • Factory authorized start-up
  • Fire tested before shipment
  • 5-10-5 Warranty
  • Zero clearance


  • Simplified, low cost installation
  • Clean, efficient combustion across entire firing range of the boiler
  • Maximum small load efficiencies
  • Captures up to $0.85 of every fuel dollar as comfort heat
  • Perfect part-load performer
  • The BTUs you want are the BTUs you get
  • Easy to inspect and maintain; can be disassembled and reassembled in minutes



For more information about this or any of our other products, please contact us or click here to find your authorized Harsco Industrial Patterson-Kelley representative.



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