parking

Besides air purifiers, clean your bedroom too to get rid of Allergen.

Wash your bedsheet, pillow case, curtain, clothes etc with hot water >40 degree celsius. Go to a laundry if you need to.

Get rid of dust, sweep and wipe the floor regularly as well as stuff that you don't need.

For air filters, avoid overpriced filters like those from direct to consumer brand.

How about for Haze?
I noticed only the older models has a haze function.

Buy sharp and not medklin

yup this is the basic concept,

package it nicely, can sell rm 400

add some function say add ion bla bla bla, can sell rm 800

add one line say kill bacteria 99%, can sell rm 1200



same with all those water filters out there