Smokeextraction

Smoke extraction refers to the process and systems designed to remove smoke from buildings and enclosed spaces. This is primarily done for life safety purposes, ensuring that occupants can escape in the event of a fire and that firefighters have better visibility and reduced exposure to toxic fumes. Smoke extraction systems are crucial components of a building's fire safety strategy.

The principle behind smoke extraction is to create a flow of air that directs smoke away from escape routes, such as corridors and stairwells, towards designated exhaust points. This can be achieved through various methods. Natural smoke ventilation relies on the natural buoyancy of hot smoke and air, using openings like vents, louvers, and roof hatches to create a pathway for smoke to rise and escape. Mechanical smoke ventilation, on the other hand, uses fans to actively draw smoke out of the building and discharge it to the outside. This often involves a network of ducts and extract fans.

Smoke control systems can also incorporate smoke barriers, such as fire doors and dampers, to compartmentalize areas and prevent smoke spread. In some cases, systems may also be designed to supply fresh air to protected areas, maintaining breathable air and preventing smoke ingress. The design and implementation of smoke extraction systems are subject to strict building codes and regulations, which dictate factors like airflow rates, duct sizing, and the location of extraction points, all aimed at optimizing safety during a fire incident. Regular maintenance and testing are essential to ensure these systems function effectively when needed.