Relations between the derived α_OX and log U using the HCM-TEFF-IR code while assuming a stopping criterion for the models of 99.9% free electrons fraction and with dust grains for the studied sample, and the measured EW of the PAHs at 6.2 μm and 11.3 μm. The different symbols correspond to type 1 Seyferts or optical Seyferts (Sy1 or 1B in Spoon et al. 2022; red triangles), intermediate type Seyferts (Sy1.2 to Sy1.9; orange diamonds), hidden broad-line Seyferts (Sy1h; purple thin diamonds), type 2 Seyferts (Sy2; green squares), LINERs (blue circles), and IR-bright AGNs (1A, 2A, 2B, 3B in Spoon et al. 2022; grey crosses).