Standard made in galvanized steel, inox or aluminium on request.
External insulation with heat-insulating adhesive polyethylene on first class of fire reaction (DM 26/06/1984).
Maximum operating temperature: 70°C.
PDC series plenum are installed on circular diffusers. The function of the plenum, or calm box, is deleting or reducing the irregularities of the air speed profile, which comes from the supply line. Because of this, the launch characteristics will comply those provided.