Air is our Passion EVA was created from a Swedish desire to bring clean air to the modern world. A group of highly specialised engineers work tirelessly to create inspired designs that have a low carbon footprint. High Density Activated Carbon Filters EVA filters only use high density activated carbon, the material that is vital to ensuring the filters last a long time whilst always working at full capacity. This makes them up to 90% more efficient at removing VOC's and toxic gases such as those given off by cleaning products. Protection You Can Trust The Alto nine utilises these filters alongside highly optimised Ozone safe UV and ionic technology. This removes 99.99% of pollen, mould, smoke, pet dander, dust mites, VOC's and toxic gases along with 99.99% of airborne bacteria and viruses. Always Designed to be Long Life This pack contains everything you need when replacing your EVA Alto nine filters. The photo-catalyst filter is designed to last a lifetime so it does not need to be replaced. The true HEPA and a high density activated carbon filters included are both long life so they will last for a whole year.