Dyson created the only purifying fan to clean a whole room properly. Dyson Purifier Cool captures ultra-fine pollutants, and project cleaner air around the room using Air Multiplier(TM) technology. The fully sealed machine is completely airtight and promises no dirty air leaks. Automatically senses and reacts to changes in air quality, then reports pollution in real-time on an LCD screen and on your Dyson Link app. Choose between fan mode for direct cooling with your choice of 0 to 350° oscillation and backwards airflow mode to purify without cooling. In Night-time mode, the machine monitors and purifies using the quiet settings, with a dimmed display. Manufacturer warranty 2 years.