The complex nature of the interaction between cultural heritage and energy efficiency, even when only referred to historic buildings, has led to the emergence of difference and separate types of expertise, creating counterproductive conflicts between innovation and conservation. To overcome this conflict a different approach must be used by both project designers, who must pursue the objective of well-defined landscape integration, and by those working in conservation, who should consider energy efficiency as a powerful instrument to boost protection. The hope is, therefore, that an instrument to implement this process can be defined.