This International Standard specifies functional and technical requirements and test methods for environmental control systems intended for use to alleviate or compensate for a disability. NOTE Such systems are also known as electronic aids to daily living. The aim of this International Standard is to provide safety requirements and recommendations for manufacturers of such environmental control systems. Target devices are not covered by this International Standard. Technical requirements for items of equipment connected within the system are to be covered by their own specific standards, e.g. adjustable beds.