Abstract: An air conditioning or cooling device for a control cabinet with a spacer frame constructed of horizontal and vertical frames sections, each having fastening bores closed by wall panels and a door of the cabinet and being in the shape of a box. The air conditioning or cooling device is designed with its two exterior dimensions being equal to or less than two corresponding clearances between the vertical and horizontal frame sections of one side of the spacer frame and the air conditioning or cooling device is installed in this side. The installation of the air conditioning or cooling device on or in one side of the control cabinet in different positions, with respect to the interior of the control cabinet, is simply accomplished since the outer end area of at least its vertical sides with fastening edges, can be optionally connected directly or with spacing elements to the facing vertical frame sections of the spacer frame.