fire suppression systems questions answered 01932 895551
Home » FAQ


Is it safe?

FirePro condensed aerosol is formed from naturally occurring elements.  It does not reduce oxygen within the protected area when discharged, nor does it have any harmful effects caused by coming in to contact with a fire.  There is a small pressure increase when the system is discharged but not enough to warrant pressure relief venting.  When it is discharged it is quite hot, but the design of the system will normally ensure that there is a safe distance between the FirePro generator and any risk.

How does it work?

A. Chemical action

There are certain reactions between atoms and parts of unstable molecules (radicals), which take place in rapid succession in the flame during combustion.

Unstable radicals try to become stable and undergo a number of reactions. A hydroxide (OH) is an unstable radical that also provides for the chain reaction of fire.

The potassium obtained from the discharge of the potassium compounds reacts during combustion with the free radicals of unstable hydroxides and forms potassium hydroxide (KOH), which is a very stable compound. In this phase the chain reaction of the free radicals stops and the flame goes out.

KOH reacts further in the presence of CO2 and forms K2CO3.

There are also other reactions that take place during the extinguishing that ensure that the end product is not harmful to humans, environment and matter.

B. Physical action

A certain amount of energy is needed for the chemical reactions to take place. The required amount of energy is supplied by the abundance of energy present in the flame.

Can it be used instead of an Inert Gas system or Chemical Agent system?

Yes.  In fact FirePro is a better alternative as it is environmentally friendly, has no high pressure cylinders or pipe and is certified to be used on class A, B, C or F type fires.

The control and indicating equipment used for a total flooding system would be very similar to that used for either of the two gas suppression systems.

Due to its modular design it can also be used within cabinets instead of flooding the entire room, saving time and money for a system installation.

Is it approved?

FirePro has many approvals, (click here to go to the certification page)

Is it expensive?

No. FirePro systems are extremely cost effective. While actual costs will vary based on the size of the enclosure, leakage, and class of hazard, in general, an installed system will be significantly less expensive than alternatives. This is due to the small amount of agent required and the fact that installation costs are dramatically reduced because of the elimination of distribution manifolds, piping, and nozzles. In some cases FirePro  thermal units could be considered for fuel storage areas, electrical cabinets, inside generator casings, etc and this where appropriate could further reduce costs due to the elimination of detection and control panel requirements.

How is the system designed?

The amount of FirePro agent is proportional to the volume of the protected space.  A simple volumetric calculation determines the amount of agent and therefore the number of FirePro generators required.  As it is simple to design changes in room layout are easily accommodated.

What is the service life of FirePro

FirePro systems have a working life of 15 years.

See all our Sectors
Case Study

Chelsea & Westminster Hospital New HV Distribution Room

Chelsea and Westminster Hospital NHS Foundation Trust is in West London and provides a range of critical specialist services for patients including – Accident & Emergency, Pediatric & Neonatal Inten...
Get in touch with us