Medium rooms Filters room air at the industry-recommended rate of 5x an hour (or about every 12 minutes) in a 40 m² room to effectively lower particle levels and maintain a comfortable environment in master bedrooms, living rooms, and playrooms. Automatically adjusts to changing conditions Integrated sensors auto-adjust to current conditions in your environment to ensure air quality remains at a healthy level. Easily adjust settings remotely from your smartphone and tablet via the Blueair app, or connect with your Amazon Alexa enabled device for voice control. Odor, allergen & germ removal Comes standard with a particle filter to remove airborne allergy and asthma triggers like pollen, dust, pet dander, mold, smoke, bacteria, viruses, and more. The combination allows us to use filters that are less dense and require less air pressure than traditional HEPA filters without a loss in performance— resulting in quieter and more energy efficient air purifiers. Built to last Housing made from durable, galvanized steel stands the test of time. Sleep without disruption Whisper quiet on the lowest speed (32 dB) and equivalent to the noise level of rainfall on the highest setting (52 dB). Low energy consumption Efficient (15-90 W) - so you can run this air purifier 24/7, knowing it uses less energy than a traditional lightbulb. Hidden control panel Manually check Wi-Fi and filter status and adjust speed setting at any time from the control panel located under the flip-top lid.