Fire protection ceiling bulkhead for ER exhaust air systems. With a continuous free cross-section and smooth inner surfaces. General building approval, approval number Z-41.3-556. Approval notice at www.maico-ventilatoren.com. Fire resistance class K90-18017. Maintenance-free. Article: TS 18 DN 160, Air direction: Ventilation, Installation location: Ceiling, Installation type: Flush-mounted, Material: Sheet steel, Weight: 2.08 kg, Weight with packaging: 2.1 kg, Fire protection: yes, Suitable for nominal width: 160 mm, Width: 295 mm, Height: 180 mm, Depth: 195 mm, Width with packaging: 296 mm, Height with packaging: 181 mm, Depth with packaging: 196 mm, Approval number: Z-41.3-556