Vertical cuts at r = 0.1 au, 0.3 au, and 1 au through the standard PRODIMO T Tauri disc model after the code modifcations described in Sect. refsec:CodeChanges. The x-axis is the hydrogen nuclei column density measured from the top, relevant line formation typically happens between about 10²¹ cm⁻² and 10²⁴ cm⁻². The left plots show the assumed hydrogen nuclei particle density n_〈H〉 and the calculated gas and dust temperatures. The middle and left plots show the relevant heating and cooling rates, annotated below, where the thick grey line is the total heating and cooling rate. We note that . An individual heating or cooling rate is plotted when it reaches at least 15% of the total heating and cooling rate anywhere in the depicted vertical range.