Coway AP-2021A Gray User Manual page 11

Bottom
Gas detector / sensor
Double HEPA filter(4D)
4D Pre-filter
Accessories
User's manual Quick start guide
Product information
Air quality detector /
sensor
Filter tray
Power cord Double HEPA filter(4D)
* When installing the initial product,
the double HEPA filter(4D) is stored
on the upper styrofoam.
10