An oven includes a cooking chamber, a gas-fired heat exchanger external of the cooking chamber and a flow path for circulating air from the cooking chamber past the heat exchanger to pick-up heat and then back to the cooking chamber under operation of a blower. The submount in one embodiment of the present invention includes: a substrate; electrodes; the semiconductor element; Au wires; and gold bumps. The AED thus enables an improved rescue protocol. 1 TAP interface on the interposer. The apparatus is a closed system in which data exchange is automated.