H₂O temperature diagnostic diagram, as defined in Banzatti et al. (2025). The observations presented in Banzatti et al. (2025), Temmink et al. (2025), and Smith et al. (2025) are shown as gray plus symbols, blue crosses, and pink triangles, respectively. The parameterized models (denoted as PA) presented in this work are shown as blue diamonds, and the chemistry models are shown as red stars. In both cases, the fiducial model is indicated as the largest symbol with a thicker black outline.