CBT Modular Boiler

Modular Steam Boilers

  • Boiler Horsepower: 9.5 - 50
  • Input Capacity (MBH): 388 - 2,040
  • Steam or Hot Water: Steam
  • Vessel Design: Tubeless
  • Number of Passes: 2
  • Fuel: Gas, Propane
  • Emissions (ppm NOx): <20
  • Vertical Tubeless design for reliability and longevity
  • Compact footprint with side mounted burner
  • Large steam space
  • Up to 50 HP
  • Natural gas, propane
  • 15 or 150 psig design
  • Up to 84% efficient
  • Up to 5:1 turndown


The CBT tubeless vertical boiler provides 99+% steam quality – low or high pressure – all delivered in a compact, easy to service vertical design to effectively and reliably meet your steam process requirements.

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  • Product Overview
  • Related Resources
  • Applications


  • Full modulation premix burner includes PID set-point control with built-in lead-lag functionality and touchscreen interface
  • Skid package solutions available
  • Thermal shock resistant
  • Quiet operation - <70 dBA sound levels
  • 5 year pressure vessel warranty
  • cULus Listed
  • ASME "H" or "S" stamped
  • Control trim and gas train are ASME CSD-1 compliant
  • External Economizer option


The CBT tubeless boiler features thick pressure vessel plates that exceed ASME code requirements. The CBT has undergone exhaustive life cycle testing to ensure reliability and longevity. The side-mounted burner arrangement allows for a large steam space to deliver exceptional dry-quality steam, even at low pressure operation. The high-density, highly resilient insulating refractory minimizes thermal losses while helping maintain its compact footprint. Convenient hand-hole access and removable burner cover enhances the CBT's serviceability. The integrated burner and controls keep the CBT operating at peak efficiency. Multiple burner and control options are available to suit your application needs. For the best operational efficiency and control, the full modulation, low-emission premix burner with 1:1 fuel-air ratio control and Falcon controller is available. The Falcon control includes built-in lead-lag functionality for systems with multiple CBT boilers.


Steam Applications, Terminology and How to Achieve Best Results →

Learn how the industry defines steam from utility, saturated and superheated to filtered and clean. Applications for the various steam types will be covered along with operation best practices.


Understanding The Different Names And Terminology For Steam →

Today, many different terms or names are used to describe steam in various applications and industries...

Modular Steam & Skids Solutions Video →

  • Process Steam
  • Humidification
  • Building Heat
  • Sterilization
  • Manufacturing
  • Food & Beverage
  • Pharmaceutical
  • Laundry & Dry Cleaning