Airflow areas within buildings – such as ventilation openings in walls, through the eaves and behind facades – can quickly become critical fire paths if not properly protected. In the event of a fire, these open areas allow flames, heat, and embers to spread rapidly between building sections. Particularly vulnerable are ventilated facades, fire-rated walls and attics, where ventilation is essential for preventing moisture damage and ensuring structural integrity. In ventilated facades, cavity barriers allow compartmentation of the cavity behind the façade cladding and hence prevent the spread of fire. At the eaves, ventilation openings must allow continuous airflow while reliably blocking flames and hot gases from entering the attic during a fire. In fire-rated walls, ventilation solutions must ensure air circulation without compromising the fire-resistant separation between fire zones.
To ensure effective fire safety, all ventilation systems in these areas must be designed to ensure reliable airflow, while also immediately stopping the spread of flames, embers, and hot gases in case of fire.