Blueair Air Purifier DM-5440i

Filters the air at a rate of approximately 4.8x an hour (or about every 12.5 minutes) in a 380 ft² room to effectively lower particle levels and help maintain a comfortable environment in your master bedroom, living room, or playroom.

• The secret behind powerful filtration: Our unique combination of electrostatic and mechanical filtration that we call HEPASilent filtration technology sets us apart. The combination allows us to use filters that are less dense than traditional True HEPA filters without a loss in performance— resulting in quiet and energy-efficient air purifiers.
• Accurate filter tracking: Helps to eliminate unnecessary filter replacement with accurate lifetime tracking via an algorithm. The remaining filter life is estimated based on fan speed, sensor data, and filter loading.
• Smart device compatible: Enable voice control via your Amazon Alexa or Google Assistant-enabled device.
• Automatically adjusts to changing conditions: In Auto mode your air purifier will automatically increase fan speed when pollution levels rise in your indoor environment and return to a slower speed once the air is clean.
• Night mode: Switch the setting to night mode to disable the air quality indicator LED and set to whisper-quiet (low speed).