Shop Air Filter System VS Box Fan | Surprise

Sponsored by https://filterbuy.com/air-filter-sizes/
After spending many hours researching the effectiveness of using the box fan with a filter attached to to clean the air in my shop i found some very surprising results. I share what i found out in this video here is a link to one of the articles I used as reference material http://www.americanallergysupply.com/box-fan-air-cleaner.htm