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.
PDL plenum are installed on linear diffuser, that can be assembled differently depending on the chosen diffuser. The purpose of the plenum, or calm box, is that of delete or reduce the non-uniformity of the air speed profile, which come from the supply line. Thanks to that the launch characteristics will comply those provided.