The dataset consists of a series of input and output files for the 1D and 3D numerical models used to demonstrate the impact of heat mining for a 100-m long vertical Borehole Heat Exchanger (BHE) in Scotland, assuming a constant or fluctuating surface heat flux. Simulations for a constant heat extraction from the BHE were performed using an updated version of the open-source OpenGeoSys finite-element modelling software (https://www.opengeosys.org/) made available in this repository. This updated version allows for calculation of the energy change in each material group in the models, as part of the HEAT_TRANSPORT process. For each model, the input files include the mesh file (MSH), the Boundary conditions (BC), geometry (GLI), Initial conditions (IC), Fluid properties (MFP), Medium properties (MMP), Material solid properties (MSP), Numerical parameters (NUM), Ouput parameters (OUT), Process (PCS), Reference (RFD), Source-term (ST) and Time (TIM) files. The output files consists of temperature time-series, 1D and 2D temperature profiles extracted from the models domain at different time steps (i.e. Tecplot output files) and of a text file indicating the energy content of each material group at each time step.