The Philips Purifiers 424121086221 AC Filter FY2420 is a replacement activated carbon filter designed to remove gases, odors, and airborne pollutants from compatible Philips air purifiers. Installed inside the purifier housing along the airflow path, this filter operates by absorbing volatile organic compounds and other unwanted contaminants as air passes through its carbon media. It ... https://www.hnkparts.com/philips-purifiers