They can be wall or ceiling installed, also on ducts with diameter 80 mm (Radia 100) . The outllet is decentralized.
On / Off via light or remote switch.
Version with overrun via timer, adjustable from 3 to 25 minutes.
Version with humidity control (adjustable from 40 to 90% of humidity) and timer (adjustable from 3 to 25 minutes).
Double speed version with 24 hrs running at the low speed.