mainly just to remove dust in the bedroom. my condo near the highway so dust buildup quite fast. and i guess to remove any mould particles in the air (my AC is damn old - came with subsale condo) so dunno what nasty stuff in there even after clean. dont have any pets or any super sensitive allergy, mainly dust. if on the light sure got those dust particles floating everywhere....

if it works well maybe will get a few more in time. but dont know if i will turn on 24/7 yet. i guess if every room on 24/7 then worth it. if just 1 mesin. wont be too efficient... hmm.