France, Kedange-Sur-Canner
155km
... class EI 30. It offers a safe protection against the spread of fire from a room into the duct or counteracts it. The aluminium mounting frame is equipped with a fire protection strip. The cover of the inspection hatch is filled with DF fire protection plates and protected against the passage of smoke by a four-sided circumferential seal. The cover is secured on both sides by self-adjusting safety arms. These safety arms ensure that the cover stops every time the door is opened. The cover can be easily removed and replaced...

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