Cartoon picture illustrating the two effective parameters impacting the shape of our FIR SEDs. The total SED, normalized to unit L_IR, is shown with a black solid line, while the dust continuum and PAH components are shown with solid orange and blue lines, respectively. We also show how the shape of the SED varies with dust temperature T_dust by displaying several templates of different T_dust in orange lines of varying intensities. The orange and blue arrows illustrate how the SED is modified by increasing T_dust and IR8, respectively.