Question

ventilation works on the principle of ​

Answer 1

In a ventilation system based on the piston principle the supply air moves through the rooms like a "piston". The piston principle can be regarded as an extreme variant of the displacement system with a minimum of turbulence in the air flow passing through the room.

Answer 2

in ventilation system based on piston principle the supply air moves through the Rooms like a "piston".