This Filter Bundle Pack included: Carbon Filter x 2pcs, HEPA Filter x 1pcs, VOC Filter x 1pcs & TiO2 Filter x 1pcs Filter Lifetime (Carbon) - 60 - 90 Days Filter Lifetime ( HEPA / VOC / TiO2) - 180 - 365 Days Net Weight Kg 0.87 Gross Weight Kg 1.23 Benefits of the ECO PURE Series 6 Stage Purification Filters Carbon Filter - Has the ability to adsorb almost any vapour and odours.dander. HEPA Filter - This filter is a fine-particle-filtering technology it will trap airborne diseases airborne allergies and is also useful fight against asthma. VOC Filterr - (volatile organic compounds) This filter traps carbon based molecules which are found to be 1000 times more concentrated in a house then outside. Because it is introduces when using household cleaner, paint, adhesives and carpets. eg: Formaldehyde (house hold products) Polyurethane (sealants,paint carpets) TiO2 Filter with UV lights. The killing zone this process is know as hydroxyl radicals and super-oxide ions. It zaps what might get through the other filters.