AMETEK Airtechnology Group has developed a particular expertise in the design of Air Conditioning Systems (A/C), to provide habitable environments for the crew/occupants of vehicles, shelters and containers. Often such environments require the occupants to operate under stress in a closed down volume, in extremes of ambient temperatures - which, even in temperate regions, may result in the temperature of their working environment climbing to levels well above the external ambient temperature, unless an A/C System is integrated. Such systems may also include some form of heating and often need to be compatible with the operation of a CBRN Filtration System.