Energy efficiency and reduction of building consumption are deeply felt issues both at Italian and international level. The recent regulatory framework sets stringent limits on energy performance of buildings. Awaiting the adoption of these principles, several methods have been developed to solve the problem of energy consumption of buildings, among which the simplified energy audit is intended to identify any anomalies in the building system, to provide helpful tips for energy refurbishments and to raise end users’ awareness. The Energy Signature is an operational tool of these methodologies, an evaluation method in which energy consumption is correlated with climatic variables, representing the actual energy behaviour of the building. In addition to that purpose, the Energy Signature can be used as an empirical tool to determine the real performances of the technical elements. The latter aspect is illustrated in this article.

Meckel’s diverticulum represents a remnant of the proximal end of the omphalomesenteric duct, which constitutes a connection between the middle intestine and the vitelline vesicle. It is the most common congenital anomaly of the gastrointestinal tract and is found in approximately 0.3–2% of the general population. Complications such as hemorrhage, bowel obstruction, infl ammation, perforation, intussusception, volvulus and malignant transformation develop in only 4–4.8% of all patients, with most cases presenting in childhood, while relative risk decreases during life. The aim of the present study is to present our experience in managing a 15-year old male patient with Meckel’s diverticulum covered perforation. It was a case of disguised perforation of the Meckel’s diverticulum, with development of adhesions to the anterior surface of the right third of the transverse colon, which was successfully treated on the basis of emergency. Diagnosis was made intraoperatively and was documented by histological examination of the excised diverticulum.