Modern digital components can run quite hot, especially satellite receivers and DVRs like TiVo units. But the enemy of long equipment life and best performance is heat - every 10° above 85° reduces life by 40%. The Dual-Mode Component Cooler can be placed below a unit and blow cool air up into the air inlets on the bottom of the chassis. Or you may easily reverse the rotation of the fans and place the Component Cooler above a heat producer, extracting hot air out the top of the component.