Does it go: Fan --> Cheap Filter --> Expensive Filter Fan --> Expensive Filter -... | Hacker News

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zacharycohn on Nov 14, 2018 | parent | context | favorite | on: Build a do-it-yourself home air purifier for about...

Does it go:

Fan --> Cheap Filter --> Expensive Filter

Fan --> Expensive Filter --> Cheap Filter

Cheap Filter --> Expensive Filter --> Fan

Expensive Filter --> Cheap Filter --> Fan

?

linschn on Nov 14, 2018 [–]

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.

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