A parametric study of a single needle-to-grid EHD air pump, intended for semiconductor cooling applications, is being presented in this paper. The effect of the distance between the emitter and collector electrodes, as well as the radius of the collector's grid wires, is being examined. To that end, several experimental EHD pump prototypes have been fabricated and their performance has been investigated. The experiments demonstrate that this simple and low-cost design is capable of producing usable results, depending on the space and voltage restrictions of the application, for emitter to collector distances greater than 15 mm.