The Dyson Pure Cool Purifying Fan automatically removes 99.97% of allergens and pollutants as small as 0.3 microns from your home. Including pollen, bacteria and pet dander. Air Multiplier technology delivers over 77 gallons per second of smooth, yet powerful airflow – circulating purified air throughout the whole room. ² The Dyson Pure Cool Purifying Fan is wrapped with a 360°, vacuum-sealed Glass HEPA filter. A layer of activated carbon granules captures odors and harmful toxins like paint fumes. Purification all year round. Purifying fan in summer. Smooth, long-range air flow to cool you in summer. Intelligent purification, automatically monitors, reacts and purifies – then reports to your Dyson Link app. So you can remotely control your environment. Night-time auto mode monitors, reacts and purifies, but only using the quietest settings. LED display dims – no disturbance. Low maintenance, easily changeable filters. With built-in notifications when they require replacing.