The replaceable industrial-grade HEPA filter filters up to 99% of fine particles. An antibacterial silver nanocoating made in Finland is attached to each filter.
The 6G Cool HEPA filter lasts 4-8 weeks, depending on the air quality and frequency of use. Therefore the 6-piece filter pack lasts about 6-10 months in use.
Filter should be replaced when the airflow of the appliance slows down considerably (air no longer passes efficiently through the filter) or when the filter is visibly dark.