How to install a linear SLOT DIFFUSER in acoustical ceiling grid

How to install a linear SLOT DIFFUSER in acoustical ceiling grid ceiling slot diffuser
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ceiling slot Slots, Length , Neck Size , Duct Size , Ceiling Cut Out , Face Size , Order Code 1 Slot, 600mm, 48mm, DCT2685 900mm, 48mm, DCT3548 1200mm

ceiling slot diffuser Linear Slot Diffusers compatible for use with Armstrong® TechZone™ and USG Logix Linear Slot Electronic VAV Ceiling Diffusers · Airflow direction from diffuser can be easily adjusted by the occupant · Available in one or two slots and