What filter can be used with HealthProtect‚Ñ¢ air purifiers?

The Blueair SmartFilter is the only filter compatible with HealthProtect air purifiers. It consists of 2 filters attached to each other at the top by a strap. Each filter is made of particle filtering material and activated carbon. HealthProtect air purifiers have 2 pre-filters that can be cleaned with a cloth or a vacuum cleaner with a soft brush.