Air purifier hack

[Mimi75]

So a clever fellow on a Facebook page I follow suggested taping a furnace filter to a box fan as a diy air purifier. Any thoughts anyone?

 

[Gazimon]

I would say that it really depends on the quality and rating of the filter you were intending to get, and what level of filtering you require. The furnace filter's main purpose is not to purify the air, but to protect the blower fan from debris and contaminants which would otherwise pile up in machinery.

What you need to know about furnace filters - National | Globalnews.ca