Special mechanic or natural ventilation systems are used.
In case of smoke clearing, the air flow is followed in the considered space by introducing fresh air and evacuating the smoke; composing elements:
- hatches: manually or automatically operated smoke evacuation devices assembled on the upper part of the building
- fire-proof doors: mobile elements to protect the functional circulation spaces in the walls; they have the role to limit the fire expansion and stop the passing of the smoke in the protected spaces
- channels: are made from incombustible materials fire resilience of at least 15 minutes
- fans: to evacuate the smoke at 4000C for at least 1 hour
- devices for the composing elements electric operation
- command central unit
To reduce the toxic/explosive gases concentration, following a command from the detection system, fresh air is introduced and choke damp is evacuated. The process continues at least until the concentration goes under the alarm limit. Depending on the monitored gas (CO, CH4, etc), special detectors are used and the installation is designed according to the legal specific provisions.
Equipments:
GEZE www.geze.de |
ESSMANN www.essmann.de |