Estimates of Τ Β cross spectra for dust and Η I filaments in the two Galactic hemispheres with the 20% mask. This is a comparison between the various spectra depending on the given Planck dataset (left, T_dB₃₅₃) and Η I template (right, T_dB_HI). To be able to compare all of these quantities, which have different physical units, we have normalized each spectrum to the mean of its absolute values.