Preparations for wall, shaft or ceiling installation without fire protection

Carry out installation preparations as described: Requirements in line with approval. However, comply with the specifications suitable for the exhaust air system in accordance with the applicable fire protection regulations.
Permissible connection ducts for connection without fire protection requirements:

Shaft/wall installation: Flexible aluminium duct with DN 80 connection diameter, max. 2 m long, two 90° elbows.
Ceiling installation (connection outside of the shaft): Steel folded spiral-seams duct and/or flexible aluminium duct with DN 80 connection diameter, max. 2 m long, two 90° elbows.