Comparison of the synthesised normalised flux profiles with the Kurucz (2005) normalised solar flux atlas (yellow lines) for the Balmer series Hα (upper panel), Hβ (middle panel), and Hγ (lower panel), where λ_air is air wavelength. Black dashed and red dash-dotted lines represent synthesised line profiles computed in non-LTE using Balder based on the sunA09 and sunA21 models, respectively. Theoretical results from the sunP2813 model (taken from P2013 Fig. 8) are depicted in blue solid lines. Grey vertical bands indicate the ‘line masks’ derived in Amarsi et al. (2018), which highlights the unblended wavelength sections. Only the wings are shown in the figure because line cores, which are formed in the chromosphere, are of no relevance in this study.