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Marine Fire Suppression – FES Series

Total Flooding Clean Agent
Engineered System FES Series

When properly engineered, these Fireboy Total Flooding Clean Agent Systems fire suppression systems will suppress surface burning fire in Class A, B, and C hazards.

  • Protects engine rooms and machinery spaces
  • Coverage up to 17,500 cubic feet
  • No water
  • No oily powdery residue
  • Total flooding system

Craft with equipment that draws intake air from within a protected space require installation of an Engine Shutdown System.

For over 40 years, Fireboy has been the most trusted name in on-board clean agent fire protection.

Fireboy fire systems are specifically designed for protecting enclosures up to 17,500 cubic feet / 500 cubic meter, such as engine rooms on boats.

HFC-227ea (DuPont™ FM-200®) fire extinguishant listings and approvals:

  • Maritime & Coastguard Agency (MCA)
  • RINA
  • Factory Mutual (FM)
  • Underwriters Laboratories (UL)
  • NFPA 2001
  • Australian Industrial Chemicals Notification
  • German Institute for Environmental Hygiene and Medicine

FES System listings and approvals:

  • USCG
  • ABS Approval
  • FES RINA Approval
  • FES MED – Marine Equipment Directive
  • MCA Certified
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USCG Commercial Brochure

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Date modified: 05-11-2022

FES System

An engineered system utilizing a fixed nozzle agent distribution network, the system is designed and installed in accordance with the IMO FSS CODE (SOLAS, IMO MSC/ Circ.1267 “Clean Agent Fire Extinguishing Systems”).

When properly designed, the HFC-227ea fire extinguishant system will suppress surface burning fire in Class A, B, and C hazards.

80% of HFC-227ea fire extinguishant fire fighting effectiveness is achieved through heat absorption and 20% through direct chemical means (action of the fluorine radical on the chain reaction of a flame.

Complete suppression using HFC-227ea fire extinguishant has the following advantages:

  • The low concentration of HFC-227ea fire extinguishant required means less visual obscurity and minimal risk to personnel.
  • The small quantity of agent discharged minimizes over-pressurization of the protected area.
  • Maximum safety for personnel due to low toxicity.
  • The ability to prevent re-ignition as long as concentration levels are maintained.

System Operation

The system consists of extinguishing agent stored in high strength steel cylinders. Manual or automatic actuators release the agent into the protected space. The agent is distributed and discharged into the protected space through fixed piping and nozzles.

Each nozzle is designed to deliver a uniform discharge of agent into the protected area. For large protected spaces, cylinders can be manifolded together. The cylinders are connected to the manifold by means of a flexible discharge bend and check valve.

Cylinders can be mounted internally or externally of the protected space.

Agent Tank

The agent storage tank consists of an approved DOT or CE-TPED high pressure steel tank filled with a valve and internal siphon tube, factory filled with HFC-227ea fire extinguishant, and super-pressurized with dry nitrogen to 360 psi (25 bar) at 70 °F (21 °C).  Tanks sharing the same manifold shall be equal in size and fill density.

Tanks are available in 8 Sizes, ranging from 8 litre to 343 litre. A nameplate is adhered to the tank displaying the agent weight, tare weight, gross weight fill density, and charge date. On the larger size tanks, an optional liquid level indicator is available.

Agent – HFC-227ea fire extinguishant

A clean, gaseous agent containing no particles or oily residues.  It is produced under ISO 9002 guidelines to strict manufacturing specifications ensuring product purity.

HFC-227ea fire extinguishant leaves no residue or oily deposits on delicate electronic equipment, and can be removed from the protected space by ventilation.

Distribution Piping Network

HFC-227ea fire extinguishant engineered systems are based on a Hydraulic Flow Program developed by Hughes Associates Inc.  The program predicts the two-phase flow of the agent and nitrogen through a pipe network. Information detailing the enclosure is entered and the program calculates the required pipe sizes, nozzle drill sizes, average nozzle pressures, and discharge time.

 As system design calculations are critical to the success of the extinguishing system, only Fireboy-Xintex Inc or Fireboy-Xintex Ltd trained personnel are permitted to perform system calculations.


HFC-227ea fire extinguishant is distributed within the protected area by the discharge nozzle which is sized to ensure the correct flow of agent for the hazard.  Nozzles are available with seven or eight ports to allow for either 180° or 360° horizontal discharge patterns.  Ports are drilled in .004 inch (0.1 mm) increments to the specified system design. Nozzles are supplied In brass with NPT threads. Nozzles are available in 6 sizes, ranging from 3/8 inch to 2 inch.


Additional Information

NOTE: Engineered fire extinguisher systems not available online. Please contact Fireboy for design assistance.