Height vs. time profiles of the temperature difference (left panels), enthalpy flux difference (middle panels), and mass flux difference (right panels), for the set-ups with the red noise driver (RN, top) and detrended driver (DT, bottom) with respect to the non-driven case (ND). The horizontal dotted black lines show the location of the T = 0.4 MK line. The black dashed lines show the estimated trajectory of a plasma parcel launched from one footpoint, with a varying velocity with height, equal to the average sound speed across the loop at each height, at t = 5 min.