An environmental control system includes a catalytic reactor and a post treatment filter for cleaning incoming air, and a vapor cycle system for conditioning the air. A first cover covers a first paper projection port through which paper as the printing medium is projected when the paper is inside a housing. The first container is attached to and co-operates with the second container to form one or more coolant channels disposed between the first and second containers. Default settings set the voltage output at 24 volts if not otherwise directed.