●Silicone packing with down-type cover provides close installation of the ceiling and blocks micro-vibration
●Stable cover installation using cover bolts
●Strengthening durability by installing the ball bearing motor
●Fire prevention and safety from overheating by installing a safety temperature fuse
●Built-in reverse flow prevention damper
●Rotation with standard static velocity
●Speed controller (optional), basic stage 2
●Installation of the smell and smoke sensor(optional)
●Installation of anion generation (optional)