EMI is the abbreviation of electromagnetic interference. It is an unwanted disturbance that affects an electrical circuit due to either electromagnetic conduction or electromagnetic radiation emitted from an external source. Federal Communications Commission (FCC) of U.S.A. and VDE Lab of Germany Prufstelle Testing and Certification Institute had set the regulations to control the electromagnetic interference.
GLOBEFAN DC cooling fan, DC blower are low voltage E-field with fine design preventing from magnetic leakage, and do not cause EMI problem on the ordinary computers and electric equipments. If your computers or electric equipments contain high sensitive components, you can add capacitor or ferrite bead core to improve EMI.