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Work out the Air Change per Hour (ACH)

STEP ONE: Enter the cost of the air purifier and the CADR (clean air delivery rate is the standard measurement for clean air) to show you the volume of clean air you get for each £ spent.


STEP TWO: Enter the room dimension where you will put the air purifier OR the maxim coverage provided by the manufacturer to show you how many air changes you will get per hour (ACH) and how long it will take to clean the air.


Note most manufacturers only provide CADR for top speed so if you are running your air purifier on low, the ACH will be different

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