Aireshare™ Room-to-Room Transfer Fan. Transfer air to rooms that are too hot or cold. Extend comfort from ductless split systems and PTAC's to rooms without air handlers. Also enhance the distribution of heat from fireplaces and stoves. Quiet, cross-flow blower fits into walls as little as 3" deep. For cooling applications mount intake fan low and supply diffuser high for optimal effectiveness and to eliminate light and sound transfer between rooms. Reverse positions for optimal transfer of heated air. Includes white intake grille and white diffuser. Control with SWS wireless wall switch or SWT wireless thermostat (heat only).