Air Purifier Spares- Boneco- Active carbon filter To be changed every 6 months Price: £14.10 incVAT The active carbon filter removes the smallest of airborne particles including pollen, dust, animal hairs, mites, smoke and odours. To be changed every 6 months. For use with the Boneco Air Purifier. IN STOCK NOW. FREE MAINLAND UK DELIVERY IN 2-3 WORKING DAYS.