Version supported on light rectangular side frames, made of galvanised steel, fixed on the scroll sides with screws.  Ball bearings on electrically conductive rubber shock absorbers, inside inlet spiders.
Available from the size 160 up to the size 710.
The standard fan can be freely rotated, to allow installation with orientation 0°, 90°, 180° or 270°, as defined in Eurovent 1/1.
