An exhaust fan takes the air from the case and pushes it out into the surroundings. So wouldn’t that very act of removing air from the case create lower pressure in the case, causing air from the outside to get sucked in, regardless of the existence of intake fans?
In: Technology
Yes, it does. However in order to help keep the inside of the PC clean, filters are fairly common on intake fans in order to keep as much dust, hair, etc from going in.
If you have no intake fans, any slight air crack becomes an intake from the negative pressure, and there’s no filter on that. So dust will get in easily.
If you have intake fans – preferably more than you have exhaust fans – the pressure becomes positive, and air blows OUT those cracks. With a filter on the intake fans, the inside keeps a lot cleaner.
Latest Answers