We have two different variants for the suspended version: The standard air roll (SLW) is for smaller to mid-sized entrances with a balanced pressure ratio. The reversed air roll (ULW) is for larger doors and difficult entry situations. In the SLW, the ambient air intake is on the room side and the air discharge directly at the door. In contrast, in the ULW version, the mixed air intake is by the door and the air discharge on the room side. The floor mounted vertical unit is installed at the side – to the left or to the right of the door (one side or both sides). The airflow is straight or at 90°. The air exits via the Coanvara discharge nozzle, a multi-nozzle system with optimised, drop-shaped profiles. Using the Coanda effect to bring the individual streams together results in a very broad, homogenous air stream. The purposely long profiles, which are parallel and steplessly adjustable in both directions (up to 40°), act as a flow straightener. This ensures the stream mixing factor remains low, as desired. The selected discharge temperature is carried far down to the floor, effectively preventing the room from cooling down. This means the discharged air is heated less than it would have been if a conventional air curtain had been used.