Version supported on light rectangular side frames, made of galvanised steel, fixed on the scroll sides with screws.  The standard version is supplied with both inlet and outlet flanges.  Ball bearings mounted on electrically conductive rubber shock absorbers, inside supporting spiders.
Available from the size 250 up to the size 630.
The standard fan can be freely rotated, to allow installation with orientation 0°, 90°, 180° or 270°, as defined in ISO 13349.
