Cast Iron FD 42

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FD Cast Iron boilers are intended for burning coal, wood, and wooden briquettes. Boilers are assembled from high quality cast iron sections and for convenience the boiler’s door is enlarged for easy loading of large fuel pieces. Non-electric automatic draft controller and manually regulated secondary air combustion control, provide air for complete burning.

FD Cast Iron boilers are known for long service life even in low temperature operation. The boilers can be used for open or closed circulation heating systems, with open or pressure expansion vessels.


  • Modern design
  • Long-life cast iron heat exchanger
  • High efficiency 80%
  • 5 year warranty
  • High reliability of regulating and safety components
  • Simple maintenance
  • Enlarged combustion chamber
  • Gravity Safety Cooling Loop Available


Technical Specification

Segments 8
Nominal Heat Output 144,000 Btu
Minimum Heat Output 43,000 Btu
Combustion Chamber Volume 16 gallons
Water Volume 9.5 gallons
Maximum Overpressure 25 PSI
Weight 772 lbs
Depth 34 inch
Height 40 inch
Width 19 inch
Length of combustion chamber 28 inch
Width of combustion chamber 12 inch
Loading chamber dimensions (height x width x depth) 9x 12x 28 inch
Flue size 6 inch
Efficiency 78-80%
Tested pressure 65 PSI
C.H. water connection 2 inch
Drain Valve 1/2 inch