Ventilation installations.

The refurbishment deals only with the installations of:

- about 1 000 m 2 galvanized sheet steel,

- approx. 600 m spiral-folded pipes made of galvanized sheet steel,

- approx. 60 pieces of fire dampers NG 200 x 200 to 600 x 500 mm,

- approx. 60 St. Variable volume flow controller NG approx. 200 x 200 to 800 x 500 mm,

- About 500 m 2 Mineral wool insulation,

- about 200 m 2 Brandschutzisolierplatten,

- Disassembly and disposal analogous to the above-mentioned masses.