Energy and microclimatic performance of Mediterranean vernacular buildings: The Sassi district of Matera and the Trulli district of Alberobello

Experimental research carried out on two types of buildings that are examples of vernacular architecture in Southern Italy, namely the Sassi of Matera and the Trulli of Alberobello are outlined in this paper. Experimental measurements on thermal properties, energy performance and hygrothermal indoor comfort were carried out to validate the numerical code provided by DesignBuilder/EnergyPlus that was used to investigate the buildings on a yearly basis. The very high thermal mass of the building structures gives rise to a quasi-constant seasonal indoor temperature with no need for air conditioning in the mid- and peak-summer seasons. The seasonal thermal storage can almost guarantee near comfort levels using simple heating systems during the cold season.