The additional covering of the upper area above the circulating unit is designed with individual metal panels, as specified in Section S3, S4 and combination thereof.  The preferred dimensions are 625 and 1250 mm for circulating units 625x1250, 1250x1250.
The additional covering height is variable and depends on the unit's suspension height under the suspended ceiling. The specified dimension is measured from the top edge of the circulating unit to the bottom edge of the suspended ceiling.
The covers are anchored using a 50x50mm angle piece directly into the CU and the suspended ceiling.