ABSTRACT
From November 2008 to December 2009 the main indoor and outdoor climatic parameters were measured both in continuous mode and on a grid of 54 points inside the Crypt by a TECNOEL psychrometer (accuracy 0.1 °C), as well as other measurements of indoor air temperature/relative humidity on 79 points, along the perimeter (Fig. 1a). The apse on the left North side of the Crypt (label D in Fig. 1a) was chosen to measure the presence of salt efflorescences and the related conditions. We observed here the most significant daily/seasonal variations. Surface temperature (Ts) probes were installed on the walls (1, 2 and 3 in Fig. 1b). Air temperature (T), relative humidity (RH) and dew point were also measured along a vertical line at 1, 2 and 3 m from the floor (4, 5 and 6 in Fig. 1b).
