| 摘要 |
An insulated ventilation duct component having at least two connection openings for coupling to other components in a ventilation installation is disclosed. The duct component, comprising an external metal sheet casing (1), an internal insulating material layer and an internal metal sheet coating, forms a unitary, stable and fire isolating unit. The external and internal metal sheet casings are mutually connected by means of one ore more perforated metal sheet elements (2a etc., 2'a etc.), which cover the corresponding end surface of the insulating material layer (6a etc.) and which has a reduced capacity of conducting heat between the inside and the outside of the duct component by way of the perforations. |
