Advanced Design, The Quietest Air Purifier Ever The Alto one was created from a Swedish desire to bring clean air to the modern world. It is the quietest air purifier on the market, producing just 16dB in silent mode. The included all in one long life filter will last for a whole year. Buy an EVA air purifier and you will receive trouble free, clean air, for years to come. Elegant and easy to Use Simply select auto mode on the touch control panel and the professional-grade PM2.5 particulate sensor will monitor the air quality, adjusting the fan speed automatically when a change in air particles is detected. The display shows an air quality reading and the colour will change to reflect your environment - blue (perfect), green (normal), purple (poor), red (high risk). Eliminate Bad Bacteria and Viruses The Alto one has been designed with an all in one high density activated carbon, antibacterial and true HEPA filter. The special protective coating on the filter removes 99.95% of airborne bacteria and viruses within one hour, helping to keep you, your family and your work colleagues safe. Enjoy Natural Fragrance With the Alto one, you can lock odours away forever and add a fragrance that will be circulated around your room automatically. Allergy and Asthmatic Protection Many modern industrial processes and materials can cause our immune systems to become over-sensitive. You can get your life back to normal if you're affected by pollen, cat or dog hair, mould, dust mites or any other allergies. The Alto one constantly removes 99.97% of allergen risks. Pollution, a Thing of the Past Open a door, window or use a gas cooker in your kitchen and your home can fill with pollution. Your EVA air purifier will remove these damaging particles to let you breathe easy. High Density Activated Carbon Filters EVA filters only use high density activated carbon, making them up to 90% more efficient at removing VOC's and toxic gases such as those given off by cleaning products.