Boilers

The ClearFire-CE and -LC models are high-efficiency condensing boilers ideal for variable flow primary systems.

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.

Ideal for variable flow primary systems, the ClearFire®-LC (CFLC) is a high-mass, fully condensing hydronic boiler, capable of variable-flow pumping, allowing for maximum operating efficiency in a variety of system applications. The revolutionary larger capacity design allows the most effective installation by using fewer units as opposed to banks of smaller boilers, thus reducing capital cost, complexity, and maintenance.

Size range: 500 MBTU – 12,000 MBTU
Uses: For comfort heat, schools, commercial buildings, apartments, libraries universities, research labs, dry cleaning/laundries, government buildings, airports, hospitals and more
Fuels: Natural gas,  propane or non-fueled electric
Efficiency: Up to 99% efficient

An introduction to the ClearFire-CE

Video: ClearFire-CE animation.

Learn more about Cleaver-Brooks Commercial and Condensing Boilers

Ideal for commercial applications, CAMUS Hydronics Ltd. is a manufacturer of an extensive line of gas-fired heat exchangers like the Advantus 2-pass firetube design or the stainless steel constructed DynaMax and vertical cylindrical Dynaforce boilers.

Size range: 80,000 btu/hr to 6,000,000 btu/hr
Uses: For residential, light, commercial applications comfort heating and low-temperature process loads. Typically used in schools, commercial buildings, apartments, and decentralized facilities.
Fuels: Natural gas or propane
Efficiency: up to 99%
Emissions: Ultra-low NOx – up to less than 9 ppm

Get more about Camus Hydronic Commercial Boilers

Cleaver-Brooks has been the leader in boiler system innovation with the philosophy that designing all boiler components integrated together will deliver a more efficient quality product. Available in both waterback and dryback designs, Cleaver-Brooks firetube boilers utilize the latest boiler technology and controls to achieve the highest efficiencies and lowest emissions.

Size range: 15 – 2,200 HP
Uses: For reliable response for low/ high-pressure process steam/heating loads, multiple fuel firing capability. Applications include indirect heating and process for various campus operations, medical facilities, and manufacturing operations.
Fuels: Natural gas, #2 oil, #6 oil and combination
Pressure: 15 to 250+ psig
Emissions: less than 9 ppm NOx to less than 30 ppm NOx

Model CBEX

The extended heat transfer tubes only found in EX systems uses Computational Fluid Dynamics (CFD) calculations to optimize the geometry of the tube and increase heat transfer by 85%. The result of the advanced heat transfer design is higher efficiency in a smaller footprint. Reduce fuel use with the optional stack economizer by recovering waste heat from flue gases and using it to preheat boiler feedwater. The LevelMaster low-water cutoff and pump control is the safest control available.

  • Steam up to 300 psig
  • 100 to 1,200 HP integral burner or 1,300 – 2,500 HP large capacity burner
  • 2 Pass
  • Natural gas/propane, #2 light oil, combination
  • Waterback or Dryback design
  • Offers 30 ppm NOx with 3% O2 across the 10:1 turndown range
  • Sub 5 ppm NOx without SCR available
  • Meets 10 ppm CO requirement
Model CBLE

The CBLE firetube boiler is a complete, single-source package including pressure vessel, integral burner, and controls. Components are designed and manufactured for reliability and long life, maximum safety, ease of maintenance, and the lowest emissions, guaranteed. Upgrade or retrofit your system with Cleaver-Brooks controls, economizers, water treatment systems, and all the other system components to build a state-of-the-art boiler room of virtually any size and capacity.

  • Steam up to 300 psig
  • 50 to 800 HP
  • 4 Pass
  • Natural gas/propane, #2 and #6 oil, combination
  • Alternate fuel capability
  • Waterback or Dryback design
  • 60 ppm, 30 ppm, 9 ppm and 5 ppm NOx emission rates are available
Model CBJT

The CBJT is a complete package, including pressure vessel, integral burner, and controls. Engineered by Cleaver-Brooks to be a fully compatible boiler and burner package featuring excellent fuel-to-steam/water efficiency, space savings, and low emissions. It is ruggedly contructed for hot water or low and high-pressure steam applications. For customers who prefer the jet burner design, the CBJT provides the highest value, with a focus on safety, ease of maintenance, lowest emissions and the flexibility to add desired options to further enhance the package. Upgrade or retrofit your system with Cleaver-Brooks controls, economizers, water treatment systems, and all the other system components to build a state-of-the-art boiler room of virtually any size and capacity.

  • Steam up to 300 psig
  • 100 to 1,600 HP
  • 2, 3 and 4 Pass
  • Natural gas/propane, #2 light oil or combination
  • Dryback or Waterback design
  • Available to < 30 ppm NOx emissions on 2 & 3 pass models
  • Available to <9 ppm NOx emissions on 4 pass models
Model ICB

Integrated package includes pressure vessel, ProFire® packaged jet burner, controls, and the latest advances in combustion technology. Upgrade or retrofit your system with Cleaver-Brooks controls, economizers, water treatment systems, and all the other system components to build a state-of-the-art boiler room of virtually any size and capacity.

  • Intercooled back boiler design
  • 3 – pass
  • ProFire packaged jet burner
  • Access to all tubesheets without confined-space limitations/issues
  • Options for 30 ppm NOx control

Read more about Cleaver-Brooks Firetube Boilers

Cleaver-Brooks has been the leader in boiler system innovation with the philosophy that designing all boiler components integrated together will deliver a more efficient quality product. Available in both waterback and dryback designs, Cleaver-Brooks firetube boilers utilize the latest boiler technology and controls to achieve the highest efficiencies and lowest emissions.

Model CBEX

The extended heat transfer tubes only found in EX systems uses Computational Fluid Dynamics (CFD) calculations to optimize the geometry of the tube and increase heat transfer by 85%. The result of the advanced heat transfer design is higher efficiency in a smaller footprint. Reduce fuel use with the optional stack economizer by recovering waste heat from flue gases and using it to preheat boiler feedwater. The LevelMaster low-water cutoff and pump control is the safest control available.

  • Hot water up to 125 psig
  • 100 to 1,200 HP integral burner or 1,300 – 2,500 HP large capacity burner
  • 2 Pass
  • Natural gas/propane, #2 light oil, combination
  • Waterback or Dryback design
  • Offers 30 ppm NOx with 3% O2 across the 10:1 turndown range
  • Sub 5 ppm NOx without SCR available
  • Meets 10 ppm CO requirement
Model CBLE

The CBLE firetube boiler is a complete, single-source package including pressure vessel, integral burner, and controls. Components are designed and manufactured for reliability and long life, maximum safety, ease of maintenance, and the lowest emissions, guaranteed.

  • Hot water up to 125 psig
  • 50 to 800 HP
  • 4 Pass
  • Natural gas/propane, #2 and #6 oil, combination
  • Alternate fuel capability
  • Waterback or Dryback design
  • 60 ppm, 30 ppm, 9 ppm and 5 ppm NOx emission rates are available
Model CBJT

The CBJT is a complete package, including pressure vessel, integral burner, and controls. Engineered by Cleaver-Brooks to be a fully compatible boiler and burner package featuring excellent fuel-to-steam/water efficiency, space savings, and low emissions. It is ruggedly contructed for hot water or low and high-pressure steam applications. For customers who prefer the jet burner design, the CBJT provides the highest value, with a focus on safety, ease of maintenance, lowest emissions and the flexibility to add desired options to further enhance the package.

  • Hot water up to 125 psig
  • 100 to 1,600 HP
  • 2, 3 and 4 Pass
  • Natural gas/propane, #2 light oil or combination
  • Dryback or Waterback design
  • Available to < 30 ppm NOx emissions on 2 & 3 pass models
  • Available to <9 ppm NOx emissions on 4 pass models


Size range: 15 – 2,200 HP
Uses: For reliable response for low/ high-pressure process steam/heating loads, multiple fuel firing capability. Applications include indirect heating and process for various campus operations, medical facilities, manufacturing operations and pharmaceuticals.
Fuels: Natural gas, #2 oil, #6 oil and combination
Pressure: 30 to 125 psig
Emissions: less than 9 ppm NOx to less than 30 ppm NOx

Learn more about Cleaver-Brooks Firetube Boilers

The ClearFire-H (horizontal design) commercial steam boilers both offer 8 sizes up to 60 HP with high efficiency and low NOx technology.

The CBT is a high-efficiency tubeless vertical boiler design up to 30 HP that reliably delivers reliable steam for your process application.

Size range: 10 HP – 60 HP
Uses: For comfort heat and process applications for schools, commercial buildings, apartments, and decentralized facilities.
Fuels: Natural gas and propane
Efficiency: Up to 99%
Emissions: less than 20 ppm NOx, less than 10% CO

Read more about Cleaver-Brooks Modular Steam Boilers

Pre-engineered for steam or hot water applications, Cleaver-Brooks pre-engineered, skid-mounted steam boiler solutions offer a simple way to get up and running in less time, with less effort, than traditional field-installed systems. All of our pre-engineered systems include: Boiler, Feed Water System, Blowdown Separator with optional Water Softener and Chemical Feed. Custom-engineered solutions are also available.

Hydronic Skid-Mounted System

Size range: 500 MBTU – 12,000 MBTU
Uses: This modular solution is ideal for office buildings, medical buildings, schools, industrial processes, heating and process applications.
Fuels: Natural gas/propane or dual fuel (depending on model)
Pressure: 5-150 psig

Steam Skid-Mounted System

Size range: 9.5 – 240 HP
Uses: This modular solution is ideal for office buildings, medical buildings, schools, industrial processes, heating and process applications. 
Fuels: Natural gas/propane or dual fuel (depending on model)
Pressure: 5-500 psig

More on Cleaver-Brooks Skid Systems

From the high-voltage CEJS electrode boiler with capability of 188,000 lb/hr down to the vertical and horizontal-type electric boilers up to 3,375 kW.

For commercial and industrial applications, Cleaver-Brooks electric boilers are clean, compact, quiet, easy to install and have no venting or fuel requirements. With no combustion considerations, electric boilers are a good alternative where emissions regulations are a concern. The units typically include operating controls, elements, fuses, contactors, safety valves and instrumentation. 

Heating power: 4.16 kW to 3360 kW 
Pressure: 15, 150, 200 & 250 PSIG
Uses: High and low-pressure steam applications like garment pressing, medical sterilizers, steam rooms, air humidification and more
Warranty: 5 years on the pressure vessel

Get more on Cleaver-Brooks Electric Boilers

The flexible watertube line of boilers is designed to minimize thermal stress and provide quick response in a compact unit. The FLX Premix enables the boiler to achieve <20 ppm NOx without FGR and <10 CO on natural gas. The Model 5 and Model M5M membrane wall watertube is designed for steam applications up to 500 psig, yet is compact in design.  

Size range: 1,500 – 25,000 MBTU/hr (35-600 HP)
Uses: For rapid response for low/ high-temperature heating and steam process, back up fuel oil and field erectable. Applications include heating for universities, medical facilities, office complexes, and various process applications.
Fuels: #2 fuel oil and gaseous fuels
Efficiency: Up to 88%

Slideshow: on the Flexible Watertube Boilers

Read more on Cleaver-Brooks Flexible Watertubes

From the Steam-Ready line to custom watertube boilers to the OSSG boiler and more, Cleaver-Brooks has extensive experience with big steam – no job is too large. Every aspect of these industrial watertube systems are designed for maximum efficiency, reliability, low emissions and available shop assembled.

  • Conservatively designed tube layouts, coupled with large drums, provide superior natural circulation and operational characteristics
  • Large, water-cooled, gas-tight furnace areas are utilized to yield optimum emissions performance, boiler reliability, and longevity with reduced maintenance costs
  • Complete access to boiler water side is provided through manways at both ends of every drum

Types: CBCW and Industrial Watertube D-Style, A-Style, O-Style and external drum-types
Size range: 10,000 lbs/hr to 800,000+ lbs/hr
Uses: Central steam plant and industrial process loads. Typical in hospitals, power and utilities, and refineries.
Fuels: Natural gas, #2 and #6 oil, alternative fuels, combination
Pressure: Design pressure up to 1,750 psig
Emissions: Available to less than 7 ppm NOx, ultra-low CO

Read more about Industrial Watertube Boilers

Heat Recovery Steam Generators (HRSGs) are state-of-the-art customized, packaged heat-recovery steam generators with gas turbines from 1MW to 95 MW. Applications include heat recovery for turbines, waste heat, incinerators, economizers and air heaters.

The Cleaver-Brooks Max-Fire® boiler incorporates an integral furnace in a single-shop assembled, packaged HRSG design. The use of the membrane/water-cooled furnace technology allows it to be fired up to 2800°F while avoiding the use of high-maintenance refractory.

The Slant and VC Series boilers are ideal for applications where the gas side inlet temperature is less than 1,700°F. With a single-pass design, this series allows the boiler system to be optimized to fit in a variety of space limitations. Similar to the Maxfire®, This series is also suitable for applications where SCR or CO catalyst must be incorporated to meet today’s stringent environmental permitting requirements.

The Modular HRSG system are designed for maximum shop assembley and available in single or multiple pressure levels to optimize cycle efficiency. This robust design benefits from more than 90 years of experience in the industry and incorporates design features proven across all product lines.

Types: MaxFire, Slant-VC, Modular
Size range: 10,000 to 500,000 lbs/hr
Uses: Central steam plant, industrial process loads and building heat. Typical in hospitals, power and utilities, and refineries.
Fuels: Natural gas, #2 and #6 oil, alternative fuels, combination
Pressure: Design pressure up to 2,800 psig
Emissions: Available to less than 2 ppm NOx

Learn more about Heat Recovery