In this paper we will present some reflections upon the use of heating facilities in monumental buildings, especially in buildings that fall into special categories such as churches, castles, convents, old school buildings, etcetera. This kind of buildings were realised when the comfort standards of its visitors and inhabitants were not as high as they are today. Now that standards have been raised generally, these buildings need to be equipped with installations that satisfy modern demands and that are capable of minimizing energy consumption, whilst raising the environment quality of its inside spaces. Case studies will be illustrated, explaining technologies that have been experimented in some historical buildings in the region of Emilia-Romagna. Parish churches of St. Valentine (Castellarano) and St. Michael (Pieve Modolena, Reggio Emilia); Castle of Viano; Riverzana village.