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> I didn't even bother taping the filter to the fan. I found bungee cord with J hooks works really well. As you correctly point out, you don't need to secure i

> I didn't even bother taping the filter to the fan. I found bungee cord with J hooks works really well. As you correctly point out, you don't need to secure it at all, but it is annoying to tap the box fan and have the filter fall over.

lisper 5y ago
That seems odd to me. I've never tried this, but it seems to me that you have to put the filter on the intake side of the fan, other the fan would just blow it off. And on the intake side, would not the pressure differential hold it in place?
- wholinator2 5y ago
  I feel like you could place it on either side of the fan as long as air is directed to go through it. My personal intuition is filter then fan but I don't see a reason it couldn't go the other way. I wonder why most devices place it on the intake though. Maybe to prevent dust from getting inside a device, but even then it'd only protect the fan from dust. Hmmm...
  - johntash 5y ago
    Fan and then filter could lead to the fan blades getting dirtier faster. Other than that, I'm not sure if it makes a difference as far as effectiveness.
- late2part 5y ago
  Good on you, master of the obvious!