The stretched ceiling Barrisol® always undergoes a deflection related to its weight (static deflection).
The air blowing into the plenum causes an overpressure of the latter.
This overpressure will cause an additional deflection (dynamic deflection) of the stretched ceiling (to be added to the static deflection of the ceiling).
The value of the total deflection of the ceiling is given by the Barrisol Clim® feasibility studies.