Pressure profiles of short (L_f < 9 Mpc; orange curves), medium-length (9 ≤ L_f < 20 Mpc; green curves), and long filaments (L_f ≥ 20 Mpc; blue curves). The thick solid lines with circles correspond to the pressure profiles presented in Sect. 4.2, while the thin dotted lines with squares show the results in which contributions of galactic haloes are included (see Sect. 5). For each case, the horizontal grey lines represent the average pressures of all the gas cells (CPmax points excluded) in the box.