Features
Duct fan, made of polypropylene.
Connection sockets on the outlet and inlet sides correspond to a folded spiral-seams duct diameter.
For direct installation between ducts.
Easy inspection and maintenance by simply opening the clamp and removing the fan.
Diagonal impeller with downstream stator (exception: ERK 100, axial impeller).
Motor
Asynchronous motor, 1, 2 or 3 levels, depending on model.
IP 44 degree of protection.
Robust motor with ball bearings, maintenance-free.
Speed control using phase control or transformer possible (exception: Version T and ST).
There can be a physically induced humming noise, through the use of phase angle technology. 5-step transformers are therefore used for speed control in rooms requiring quiet fan operations.
Thermal overload protection as a standard feature.
Electrical connection
Externally fitted terminal box with cable entry grommet.