The coil will be made of stainless steel or aluminium. Its diameter will depend on the actual width of your work. It will oscillate between 180 and 300 mm.
An external engine will be more efficient than an axle version. A calculation made by a project office will determine the preferred pair. This will be 250, 500, 600 or 1000 N/m.
The damper blades in your installation should have little air. This particular shape, but conforming to the NF standard, requires less power.
The cavity must follow a specific technical plan. It must be able to accommodate the rolled up apron, which can be a significant height. The masonry wall will be preferred for large widths. Indeed, the PVC partition will not be proposed at more than 6 m.