Top panel, left: temperature (solid line) and pressure (dashed line) as a function of the curvilinear coordinate along the field lines, s. Right: divergence of the conductive flux (asterisks), radiative losses (crosses) and constant heating rate, E_h (solid line), as a function of the temperature, for loop 4. Middle and bottom panels: as in the top panels for loop 10 and 15, respectively.