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Thank you for your interest in Blueair. We do not publish the results of the square footage per fan speed rate. This is because once the machine has run on high after initial use in a sealed room (at 5 air changes per hour), the amount of clean air moving through the room will remain the same at any level. The only difference will be the speed of which it continues to clean the air (though again, after running on high, the air will remain continuously clean in the marketed square footage).
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