Fully COndensing

  • Fully condensing high-mass firetube boiler
  • Compact footprint
  • 500 to 6,000 MBTU
  • Standard less than 20 ppm NOx
  • Ideal for variable flow primary systems
  • Standard dual-return connections
  • Robust, no flow tolerant design

The ClearFire®-CE (CFC-E) is a compact, high-mass, fully condensing hydronic boiler, capable of variable-flow pumping, allowing for maximum operating efficiency in a variety of system applications.

CFC-E Video Image(1)

The ClearFire®-CE (CFC-E) is a fully assembled, high-mass firetube condensing boiler with a large-water-volume pressure vessel. The high-mass design equates to a low pressure drop, reducing pumping energy with no minimum flow requirements.

The pressure vessel is also thermal shock proof, capable of high-delta-T system designs to maximize condensing and reduce flow rates. The highly effective fireside heating surface with industry leading AluFer® tubes leads to superior efficiencies in all operating conditions.

The modulating, premix burner control automatically adjusts the air/gas mixture for maximum burner efficiency. The linkageless burner provides fully modulating turndown without the use of complex air/fuel mixing valves.

The dual-return connections have the ability to increase condensing in the boiler and raise efficiencies by 6%+ more than a single-return boiler.

The ClearFire-CE provides the reliability and longevity that customers expect from Cleaver-Brooks. The CFC-E is designed to leverage the advantages of primary-variable-flow pumping systems with a small overall footprint, offering system flexibility and true operational efficiency without compromise. 


  • True counterflow-arrangement heat exchanger for maximum heat transfer
  • High-mass design in a compact footprint, ideal for retrofit applications
  • Duplex stainless steel combustion chamber, tubes and tubesheet offer excellent corrosion resistance
  • Dual-temperature returns for additional energy savings potential
  • Falcon total boiler control with lead-lag capability up to 8 boilers
  • Quiet operation, <70 dBA sound level at 3 feet
  • Fresh-air inlet connection for direct-vent combustion air
  • Low waterside pressure drop for reduced pumping energy requirements
  • Hinged burner for easy access
  • Thermal shock resistant
  • cULus listed

Dimensions & Ratings Chart

Boiler Book



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  • Lower fuel costs
  • Improved boiler and system efficiency
  • Lower emissions
  • Redundancy
  • Improved system turndown
  • Reduced footprint 

  • Office Buildings
  • Medical Office Buildings
  • Process
  • Heating
  • Industrial Process

Featured Product

Boiler PSIG 139 x 114

Boiler Monitor Remote Monitoring Solution Monitor activity of ClearFire ® boilers 24/7 from any location View data via an app or customizable online dashboard Immediate notification of a boilerissue Helps optimize boiler system Data travels outbound only via an encrypted co