Top: scaled joint probability density functions (JPDF) of n_Hn_e versus T in the chromosphere and corona of our simulation snapshot. The inner blue contour includes 50% of all pixels, the outer contour 75%. Each column in the panels is scaled to maximum contrast to increase visibility. Bottom: volume-integrated, frequency integrated and cross-section weighthed photon losses as function of temperature in our simulation snapshot (i.e., ^∫_VL_csw dV in Eq. (5)).