Gas Suppression Systems

Churchesfire is an F Gas certificated company, authorised to work on fire protection systems containing Fluorinated Greenhouse Gases.

Standards and Codes of Practice

Fire suppression systems should be installed to at least the ISO14520, BS6266 and BS5839 codes of practice for fire detection and fire suppression systems.


Fire suppression systems use two modes:

Manual fire suppression mode

Requiring human intervention, the operation of a gas release call point or manual actuator discharges the fire suppression agent. The fire suppression system does not deploy the system automatically.

Automatic fire suppression mode

Two zones or two devices are needed to prove a coincidence – confirmation of the presence of smoke. The fire suppression system will then deploy the fire suppression agent. The delay from the first stage alarm (first detector activated) to the second stage alarm is variable, depending on the detectors’ speed of response. Once the second detector is activated, the system normally incorporates a 30 second delay from alarm to fire suppression release.

High Pressure Cylinders

All extinguishing systems must have their cylinders hydrostatically tested according to BS 5430. 

Room Integrity Testing

All systems designed to cover the entire enclosure must have the given area integrity tested to prove that the gas can be contained on discharge for ten minutes, or 20 minutes for CO2. BS:ISO 14520 requires an enclosure integrity test (or room integrity test, fan test or pressure test) to be conducted on system installation and at annual intervals.