The floor box GBU is designed for floor installation in connection with fresh air supply. They are equipped with ø63 mm connecting pieces with LindabSafe sealings for connection of either SR 63 spiral-seamed ducts or plastic hoses. The GBU is equipped with a telescope function allowing flexibility in the installation phase, for instance in connection with embedment.
It is possible to use GAT as regulating damper.
Fits to B3020 grilles.