Previous studies have already shown that the use of personalized environmental control systems significantly increases user satisfaction levels in buildings. The purpose of Annex 87 is to establish guidelines and technical reference materials for customized environmental control systems to be incorporated into projects and operating buildings. Furthermore, it aims to quantify the benefits of these systems for health, comfort and energy efficiency. The scope of the project encompasses customized systems that locally modify heating, cooling, ventilation, air purification, lighting and acoustic conditions. More information about Annex 87 can be found by clicking here.