During the final phase of the ASIEPI project on Assessment and Improvement of the EPBD Impact, the idea of producing a book which presents the major findings from this project was launched.

Article 19a of Directive 2018/844, includes the requirement for the Commission to perform, before 2020, a feasibility study to clarify the possibilities and timeline for introducing two aspects in order to improve buildings’ energy performance: - The inspection of stand-alone ventilation systems and - An optional building renovation passport.