The effect of the inclusion of wellbore heat loss in genGEO is illustrated in Figure . Figure shows the variation in production temperature as a function of mass flowrate for genGEO and other simulators. The reservoir temperature in this base case example (see Table in the main paper) is 102.5°C. If wellbore heat loss were not included, the water production temperature would also be 102.5°C in all cases. The CO₂ is less affected by wellbore heat loss-the temperature of CO₂ naturally decreases as it expands travelling up the wellbore. Figure shows that well heat loss is negligible above a mass flowrate of ~40 kg/s. All things considered, the heat flux, , , into a well is relatively constant and does not depend on the wellbore mass flowrate (Equation S65). However, the enthalpy change of the fluid due to heat conduction is inversely proportional to the mass flowrate. Thus, we expect the heat loss for any well to begin significantly affecting the fluid temperature below ~40 kg/s.