The indoor air is not purified well enough.
The indoor air is very dirty.
Ventilate the indoor air before you use the product.
The ultra-fine filter is clogged with dust.
Clean the ultra-fine filter properly.
The Safe Plus filter is clogged with dust.
Replace the whole filter.
The location is too large for the capability of the air purifier.
Use a product that fits the size of the room.
Place the appliance away from windows, doors, and other areas with frequent influx of outdoor air.
The air inlet or outlet is blocked.
Remove the obstacle.
The appliance is located in a corner or an area where air circulation is blocked.
Move the appliance and install it again.