An embodiment of this invention is a system that recommends a change of management jobs for a plurality of apparatuses separated into a plurality of groups. A humidity-controlled chamber incorporates a housing, a humidifier, a sample chamber, a reference chamber, Peltier devices, humidity and temperature sensors, and gas transmission lines into a single unit. The pan may support one or more Dutch ovens, thus providing a \u201cfire pit\u201d of modest size, foldable into a very small envelope. The fine release-agent particles are dispersed in the resin coating layer.