Electronic – Fans: suck or blow


For a fan, should air be sucked in, or should it blow air out?

I'm talking about an enclosure mounted fan.

Best Answer

Airflow is the key. Any direction will do. Just keep in mind where the hot components inside your enclosure is.

However, if you blow into the enclosure, you have the option of putting a dust filter on your fan. Whereas if you have your fan blowing out, air will enter your enclosure through all sorts of holes, and lots of dust may eventually accumulate.