A ventilation device includes a centrifugal fan capable of rotating in one or both directions, placed in an air inlet chamber and delivering air towards the motor. A call is received for one service function from a service function call within one application program. flush syringe assembly includes a barrel having an inside surface defining a chamber for retaining fluid, an open proximal end and a distal end with a passageway therethrough in fluid communication with the chamber. After the die or multiple die segments are singulated or cut from the wafer, insulation is applied to all surfaces of the die or multiple die segments, openings are made in the insulation above the desired electrical connection pads, and the die or multiple die segments are placed on top of one another to form a stack. The slot extends essentially the entire length of the outer tube. A method includes forming a contact pad in a last wiring level and forming a plurality of wires of the contact pad extending from side edges of the contact pad to respective ones of a plurality of vias.