ADDITIONAL ACCESSORIES CLASSIFICATION CTM Double deflection grilles withmoveable blades parallel to the longer side in front and parallel to the shorter side rear.CMT Double deflection grilles withmoveable blades parallel to the shorter side in front and parallel to the longer side rear. MATERIAL CTM-AN Extruded aluminium grilles.CTM-N Galvanised steel grilles.All grilles are provided with seal on theback of the frame in order that the perimeter in contact with walls, ceiling, ducts, etc... is airtight.SP Opposed blades damper to regulatethe air flow. The damper is operated by an easily accessible...