Photometric redshift recovery, for injected dust temperatures T_xgal = 20, 30, 40, and 50 K (from left to right). Redshift estimates have been obtained assuming the exact dust temperature for each source, and an ideal CMB template. The 2D histogram of the recovered redshift estimates versus the injected redshifts are shown for two cases of the quality of the CMB template used for cleaning: ideal (top) or highly contaminated (bottom). The dotted lines show the ±20% limits around the 1:1 relation (dashed line).