The In-Home Monitoring System (IMS) [9] consists of a set of wireless infrared proximity sensors to detect motion, as well as pressure switch pads (sensor mats) that can be used to infer specific activities based on the position of the mat. The system also includes a stove temperature sensor, switches on cabinet doors and a bed sensor capable of detecting presence, respiration (normal/ abnormal), pulse (low, normal or high) and movement in the bed. The Data Manager collects data from the sensors, date-time stamps the data and logs it into a file that is sent to a secure server as binary streams stripped of identifiers. The system exploits low-cost X10 technologies coupled with specialized filtering and analysis.