Exhaust filter The kit contains one exhaust filter. The filter catches fine dust before the air is expelled back into the room. This results in clean, dust-free air in your home. The filter should be replaced once a year. Washable motor filter The kit contains one washable motor filter. This provides high filtration levels and prevents fine dust from reaching the motor and damaging it. The filter can be washed. It is recommended to replace the filter once a year. Washable foam inlay The kit contains one washable foam inlay filter. This filter provides additional protection for the motor and should be placed next to the washable motor filter. The filter can be washed. It is recommended to replace the filter once a year. What's in the box 1 x Exhaust filter 1 x Washable motor inlet filter 1 x Washable foam inlay