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Thank you for your question! The Blue Pure 511i Max air purifier efficiently cleans 237 ft² in 12.5 minutes and 1,138 ft² in 1 hour, effectively reducing particle levels, including airborne mold particles. For best results, we recommend placing the purifier in a room within the recommended coverage area and running it continuously (24/7) to maintain optimal air quality. Your filter will last up to 1 year thanks to our proprietary RealTrack algorithm that accurately calculates the remaining filter lifetime based on fan speed, usage time and pollution levels. When it's time to replace the filter, the filter replacement LED on the interface will turn red to remind you. You can also connect to the Blueair app to receive an alert and easily re-order at the touch of a button.
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