Herschel (70, 160, 250, 350, 500 μm) – Bolocam (1.1 mm) SED (black diamonds) of UCHII regions, fitted with the TLS model using the diffuse parameters (total emission in red, DCD and TLS processes in light and dark blue). Squares represent the model integrated in the band filters of each instrument, allowing direct comparisons with data (diamonds). SED corresponding to the central (1) and surrounding (2) part of the region are represented in dark and light colors. MSX data in band E (21.3 μm) and Spitzer data at 24 μm are also visible in the plots, represented by the purple circles.