The Dyson Pure Cool - purifying tower fan, is the only purifying fan to clean a whole room properly. We design our purifying fans to go beyond test chamber conditions and focus on real home conditions - this is more than just having an efficient filter. Dyson engineers and research concluded that to clean an entire room properly, you need to sense pollution events automatically; capture ultrafine pollutants; and project cleaner air around the room using Air Multiplier technology. Only the Dyson purifying fan is designed and tested to do all of this. Features: Intelligently purifies and cools you. Dyson technology helps create a cleaner, healthier home - Our vacuums and purifiers are scientifically proven to capture particles as small as allergens and bacteria. 360° filtration system uses activated carbon to remove gases and odors and a HEPA filter to capture 99.97% pollutants as small as 0.3 microns. Air Multiplier technology circulates purified air throughout the whole room Automatically senses and reacts to changes in air quality - then reports pollution in real time on 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. Program your machine to turn off after pre-set intervals between 1 hour and 8 hours. Safe and easy to clean with low maintenance, easy-to-replace filters. With built-in notifications when they require replacing. Curved and magnetized remote stores neatly on top of the machine. Using compatible voice control services, control your machine with simple, spoken instructions. Works with Amazon Alexa and Apple Siri®. Certified Asthma and Allergy friendly by the Asthma and Allergy Foundation of America. Awarded the Parent Tested Parent Approved seal of approval. The seal of approval that families trust. Other product listings for non-authorized 3rd party sellers are not covered by official Dyson warranty. Warning – unauthorized replacement filters are not tested or verified to perform at HEPA standard. Only authentic Dyson filters are recommended to ensure a sealed system and proper functioning of the machine. The official Dyson replacement filter can be found by searching "B07HJFXFNL" in the search bar. 1 The AHAM AC1-2015 standard sets out how air cleaner manufacturers can define their performance by "the relative reduction of particulate matter suspended in the air in a specified test chamber" - this means their performance is based on cleaning efficiency rates only. 2 Based on air projection tests and oscillation capability. 3 Based on a 2017 Dyson survey of self-reported allergy sufferers after use. Cord length- 71.2 inches.