A method and system of virtual energy management display involves periodically receiving via a mesh local area network electronic data representing energy management-related information by a RF communication-enabled memory storage device coupled to an electronic display device within a home area network. The system includes at least one image source, such as a scanner andor a library of stored images, a controller unit and a printer. The combination of the nozzle diaphragm and the replacement part conform to the original manufacturer’s dimensional specifications for the nozzle diaphragm. The heat transfer device is preferably powered by one or more metal wires co-extruded within the catheter body. A client device may also serve as a tunnel device, serving as an intermediate device to other client devices. The protective layer has a silicon-aluminum-carbon-nitrogen solid solution composition and microstructure.