DVS 180 – Helios – Automatic Backdraught Shutter With Spring Return
To prevent cold air from entering when the fan is not running.
Automatic opening when the fan is started up.
Cylindrical sheet steel housing with flanges on both sides.
Can be screwed directly onto the fan base plate or flange.
Hole pattern according to DIN 24155.
Flaps made of aluminum, low-noise operation thanks to plastic buffer stops.