The τ_Ross- and time-averaged temperature as a function of Rosseland optical depth for sunA09 (identical to the red dashed line in the upper right panel of Fig. 4) and a model constructed with the MHD EOS (black solid line labelled sunA09MEOS). The two solar models are identical in all aspects except that they employ different EOSs. In the middle and bottom panel, the model based on MHD EOS was used as a reference to compute relative and absolute differences.