High medium-enthalpy geothermal reservoir of central Italy are in carbonate rock.
The Caldara of Manziana is characterized by a very high soil and advective CO2 flux.
Gas is dominated by CO2 and its composition has been used for T-P estimations.
The TINs model allowed to estimate depth and temperature of the top of the geothermal reservoir.
The data obtained in this study allowed, an estimation of CM geothermal potential.