The MCAS is a diffuser mainly used in modular ceiling systems. The perforated front plate with reduced see through view gives the unit an aesthetical finish. It's equipped with push-pull locks to provide easy access for cleaning or changing the flow element. In combination with the swirl element insert plate type MCWS the unit is suitable for the supply of heated or cooled air. With the MCAV element the unit can only be used for exhaust. The system is especially applicable to situations where high requirements are to be met with respect to hygiene, flexibility and comfort.