An innovative integrated system for building energy and comfort management has been implemented on two occupied offices of the LESO-PB building. The measurements concern both energy consumption and comfort assessment. The results show that the system saves 19% of total energy consumption in comparison with a conventional heating controller with night setback. The thermal comfort level has been kept at a high level and the visual comfort has even been improved by the integrated control system. These good results are mainly explained by the integration concept of the overall controller and the energy efficient control of the blinds, which allow an optimal use of the passive solar gains. The user's satisfaction has been studied; it highlights the need of a long-term adaptation of the controllers to the user's wishes and preferences for a better acceptance of automatic control systems. (C) 2002 Elsevier Science Ltd. All rights reserved.