PERI SHELTER is an unmanned outdoor cabinet that houses field instrumentation and process control systems, such as Satellite Instrument Houses (SIH) or Remote Instrument Enclosures (RIE). All system components, controls, I/O connections and active parts of the cooling system required for normal operation are accessible from the outside of a PERI SHELTER. This inside-out approach effectively eliminates desks, control panels, door opening areas, corridors and escape routes, which not only reduces space requirements, but also massively reduces planning and design costs.