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How long does it take my air purifier to clean the room?

This depends on multiple factors such as square footage, ceiling height, and the pollution level in your space. 

Unit Size Space Approximate* Air Change
Compact 0-500 sqft 2-3
Ultrafine 468 0-1200 sqft 2-3
950P 0-3,500 sqft 2-3

*Based on a controlled testing environment

Air changes per hour or air change rate is a measure of the air volume added to or removed from space in one hour, divided by the volume of the space.