1. A cleaner indoor climate The Pure circulates and purifies the air in your home or office, removing dust, pollen, odors, particles, pollutants, and more. It can automatically turn on/off or be controlled via a WiFi app, Bluetooth, Google Home, Alexa, Siri, and Apple Home Kit. 2. Why should I my filter? The effective operation of the Pure depends on a clean filter. You should the Pure filter when to ensure air purification. The internal HEPA and activated carbon filter system cannot be cleaned manually. Simply open the filter flap of the Pure, the filter, press the power button, and you're done! 3. How often do I need to the filter? The Pure uses a special algorithm that analyzes indoor and outdoor pollution levels as well as usage patterns to determine when the filter needs replacement. This is typically required every 6 months, but every household is different. 4. What particle sizes does the Pure remove from the air? The Pure's HEPA filter captures particles as small as 0.1 microns (over 100 times thinner than a human hair). This includes pollutants, contaminants, and fine dust (PM1.0, PM2.5, and PM10). Additionally, the activated carbon filter absorbs harmful gas molecules such as smoke and volatile organic compounds.