Examples of a cool (left column) and a hot (right column) loop in equilibrium. Top row: Electron temperature (K) and density (10⁻⁴ cm⁻³) profiles along the loop. Bottom row: Profiles of the electron energy conservation terms along the loop: H = 2.3 × 10⁻³ erg cm⁻³ s⁻¹ (red lines) is the uniform and constant heating term; Q_R is the power loss due to radiations; and C_e(+) (dotted light green lines) and C_e(−) (dark green lines) are the electron conduction, respectively, when they are a heating or a cooling term.