History
In the early 1980s, AHAM developed a method for measuring the clean air delivery rate for portable household electric room air cleaners. The resulting standard became an American National Standard in 1988 and was last revised in 2006. Known as ANSI/AHAM AC-1, it measures the air cleaner's ability to reduce tobacco smoke, dust and pollen particles in a room. It also includes a method for calculating the suggested room size.
Read more about this topic: Clean-air Delivery Rate
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