Case fans may be placed as intake fans, drawing cooler outside air in through the front or bottom of the chassis (where it may also be drawn over the internal hard drive racks), or exhaust fans, expelling warm air through the top or rear.

What are case fan used for?

Case fans may be placed as intake fans, drawing cooler outside air in through the front or bottom of the chassis (where it may also be drawn over the internal hard drive racks), or exhaust fans, expelling warm air through the top or rear.

What are PC case fans?

A computer case fan keeps your computer cool by circulating hot air out of the computer case and cooler air into it — just like any other fan. … These case fans are ideal for PCs and desktops because laptops usually have fans built in, or you can add an external laptop cooling pad for additional air intake and exhaust.