Radiative heating and cooling agents as given by Cloudy for models with a fixed density at the planet radius (right column of Fig. 3). The rates are expressed as a fraction of the total radiative heating or cooling rate. The grey dotted line labeled “other” is the sum of all other agents that are not plotted as they do not exceed a fraction of 0.01. For some processes such as heating by “metal lines”, we unfortunately cannot obtain more details from the Cloudy output about the specific elements responsible. Please note the log-scale when interpreting the relative importance of the different agents.