空氣清淨機 3合1 HEPA Pro濾網 適用539AS/530S 白色

The filter slid in perfectly and the pre-filter layer is catching so much dust already. My allergies feel noticeably better after just two nights of running it.

I noticed the air quality sensor readings dropped right after installing this new filter—the difference is noticeable. It clicks in securely and the whole process took less than two minutes.

Finally swapped out the old filter after six months—the air feels noticeably fresher in the living room. It slid right into the 539AS without any hassle, and the HEPA layer catches dust like a champ.