Cheap Filter --> Expensive Filter --> Fan You put the filters on the intake, so ...

		linschn on Nov 14, 2018 \| parent \| context \| favorite \| on: Build a do-it-yourself home air purifier for about... Cheap Filter --> Expensive Filter --> Fan You put the filters on the intake, so that the airflow helps making a seal instead of creating leaks. You put the cheap filter first everything that it catches will not clog the expansive one.