The DIG (De-risking Ireland’s Geothermal Energy Potential) project aims to better understand Ireland’s low-enthalpy geothermal energy potential by integrating inter-disciplinary and multi-scale datasets (Kiyan et al., 2022; Chambers et al., 2022). One aim of the project is to evaluate the geothermal energy potential of the Upper Devonian Munster Basin within the Variscides of southern Ireland. A more specific objective is to focus on the Mallow warm springs area (MWSA) which is sited along the Killarney-Mallow Fault Zone (KMFZ).Two parallel magnetotelluric (MT) profiles have been deployed across the east-northeast trending KMFZ in the MWSA since November 2021 to directly image fault conduits and fluid aquifer sources at depth, within a convective/conductive region associated with the known occurrence of warm thermal springs. This will determine the scale of the geothermal anomaly and hence will evaluate the potential for local- and industrial-scale space heating in the local-scale survey locality.To eliminate the electromagnetic noise from the acquired MT time-series data, we have made efforts to improve the data quality by not only using the new generation Phoenix Geophysics MTU-5C systems but also processing these time-series data with two different processing software; (i.e., FFProc, an improved multivariate robust statistical data processing software (Castro et al., 2021) and EMPower, a commercial remote-reference software from Phoenix Geophysics).The 2-D inversion of these data reveals a striking vertical fault conductor zone (FCZ) extending to depths of at least 4 km beneath the KMFZ. The corresponding 3-D inversion model for these data along the two profiles further confirms the existence of the FCZ. Based on our preliminary results, we propose that the KMFZ is probably the main fault conduit associated with the Mallow warm springs area and the FCZ delineates the fluid pathways associated with the fault zone.