Compact version, supported on light rectangular side frames, made of galvanised steel.  Up to size 18/8, with ball bearings on electrically conductive rubber shock absorbers, inside supporting spiders;  larger sizes use ball bearings on cast iron pillow blocks, with grease points.  The standard version is supplied with both inlet and outlet flanges.
Available from the size 9/4 up to the size 30/14.
The fan can be freely rotated, to allow installation with orientation 0°, 90° 180° or 270°, as defined in Eurovent 1/1.
