Objective. This paper describes the user-centred specification, development and evaluation of a prototype telehealth system, capable of enhancing self management for people with congestive heart failure (CHF). The overall aim is to produce a system to enable people with a range of long term conditions to self manage. CHF is one of three exemplar conditions under investigation in the SMART2 (Self Management supported by Assistive, Rehabilitative and Telecare Technologies) project.