The BlueAir Sense + PAC filter is suitable for the BlueAir Sense + air purifier. This filter set consists of a pre-filter with activated charcoal filter and HEPA filter. The pre-filter filters out small parts from the air and the HEPA filter the coarse parts. House dust mites, bacteria, allergens, pollen, viruses and other small parts no longer stand a chance. Replace the filters of your Blueair air purifier in time for the best cleaning result.