air cleaner

[Glen]

Attempting to build an air filter. I have a computer/equipment bay fan that moves alot of air (cfm is a ?). Also purchased some furnace filters. Going to build a box to hold four filters, two
fore and aft of the fan and make them easy to access for cleaning
or replacement.

Interested in hearing other ideas, thoughts, failures or successes.

[woodmannie]

Why aft? all air is brought in before. I think two input openings, double filtered, and an open exit. If any dust gets through, it would clog up the aft filters and you wouldn't see the dirt without removing said filters. Let the exaust port open. Any dust that gets that far will be ciculated back and filtered at the front.