Handbook F C22022 04 21

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Legend
Installation 2 - Dry:
F2 Mineral wool filling (min. 50 kg/m3)
F3 Fire resistive coating, e.g. Promastop-CC/Promat
F4 Screw d=5.5; e.g. DIN7981
1 Fire damper (F-C2)
2 Connected metal ductwork
A1 Cover boards CBR-C2 (accessory) obligatory
A2 Flexible duct coupling FCR-C2 / return plastic or metal valve (e.g. BALANCE-E)
3 Concrete/masonry/cellular concrete wall or ceiling
4 Flexible (plasterboard) wall
4a 2 layers of plasterboard fireproof plate type F, EN 520
4b Vertical CW – profiles
4c Horizontal UW – profiles
4d Mineral wool; thickness/cubic density see picture.