Fire Suppression Extract Systems
Few Fire Suppression System installations have a natural venting path to an external fresh air source from within a protected enclosure. When this is the case forced venting must be provided to ensure that contaminants such as smoke or the extinguishant can be extracted following an extinguishant release.
Generally, to extract the extinguishant following a discharge an extract vent is installed either by way of a floor box or low to the floor on a wall, as extinguishants are heavier than air.
Pressure Relief Venting
Pressure venting is designed specifically for positive and negative pressure venting associated with Inert and Synthetic extinguishant fire suppression systems.
Pressure vents are installed to allow pressure relief within a room during the discharge of a fire suppression extinguishant, especially for Inert gas extinguishants. This is due to the amount of gas being added to the room can be up to 50% more than was there originally. This creates an over pressure that must be vented to fresh air immediately to ensure that all the walls, windows and doors are not damaged during a discharge.
Pressure vents provide both protection against the positive-pressurisation spike during an extinguishant discharge of Inert agents and the Duel flow venting required for synthetic extinguishant agents.
For Synthetic extinguishants, such as FM200 or Novec1230, it is possible to utilise combined Extract vents and Pressure vents, so only one unit is required, providing substantial cost savings.
Rex Group Services Ltd
Mowbray House
18-22 Mowbray Street
Sheffield S3 8EN
Tel: 0044 (0)1142754278
Fax: 0044 (0)1142760456