A radiator, particularly a skirting radiator for heating a room space is mounted just above floor level comprises a panel for mounting on a wall, the panel having a first surface for facing the wall, an opposed second surface for facing away from said wall and at least one longitudinally extending conduit adjacent to said first surface and for carrying heating fluid, wherein the radiator further comprises first and second longitudinally extending rails, for attachment to a wall, which are spaced apart in the lateral direction, the panel is insertable between the first and second rails and is arranged such that when it is inserted between the first and second rails, the panel forms a snap-fit engagement with the first and second rails.