The FIGURE is a front perspective view of a double hung replacement frame sill for a window, showing our new design, the rear perspective view being a mirror image, and which is shown fragmented indicating indefinite length. A first heat exchanging portion is disposed in a refrigerant path between the condenser and the evaporator for evaporating the refrigerant under an intermediate pressure between the condensing pressure of the condenser and the evaporating pressure of the evaporator to cool the process air by evaporation of the refrigerant under the intermediate pressure. One of those rollers can have a series of pockets in its roll face to receive additive formulation from a reservoir and to define the pattern of the formulation on the paper. The brush moves associated with movements of the threader arm, and comes into contact with the magnetic head only when the threader arm stays at a predetermined position.