Improve your air quality with the Challenge Air Purifier. The HEPA filter removes pollen and other respirable particles. The activated carbon filter effectively absorbs harmful chemicals such as formaldehyde, as well as odours and smoke. Ideal for asthma and hay fever suffers, this purifier will help relieve year-round allergies, providing you and your family with a healthy environment to live in. Suitable for room size up to 14-24m. Quiet operation. 4 speed settings. HEPA filter. Filter included. CADR rating smoke 139. CADR rating pollen 102. CADR rating dust 130. Night light. Size H59.1, W40.3, D23.8cm. Manufacturers limited lifetime guarantee.