You can adjust the wind amount of the clean booster.
While in Booster mode, press the Booster Speed button.
Each time you press the button, the speed changes in the following order: Auto ~ Low ~ Middle ~ High ~ Turbo.
If you adjust the booster fan speed, it is displayed on the status panel. It increases by 2 grids at a time.
[Example of Booster Speed 'Middle']
If you choose Auto, the fan inside the clean booster is adjusted according to the speed of the purifier. For example, if you change the speed of the purifier to 'Low', the booster fan speed is changed to 'Low' as well.
You may control the booster fan speed only in Booster mode. In the other modes, you will hear a warning sound and won't be able to control the function.