Ventilation component for insertion in opening of wall or ceiling, has projection projecting outwards from opening in condition when projection is inserted in opening such that free cross-sectional area is formed for flowing of air

摘要

The component (1) has a fire protection agent that increases its volume at high temperature for closing an opening. The component has a projection (7) projecting outwards from the opening in a condition when the projection is inserted in the opening such that a free cross-sectional area (11) between an inner side (10) of the opening and an outer side of the component is formed for flowing of air. The component is designed in a cylindrical shape. An independent claim is also included for a device for closing an opening of a wall or ceiling.