Strategically located ceiling fans can improve home comfort at a significant lower operating cost, compared to the cost of running your whole-home heating, ventilation and air-conditioning (HVAC) system. Since warm air is lighter than cool air, it naturally rises to the ceiling. But, this warm air can be redistributed throughout the room by a fan, as long as the fan’s blades are tilted to the proper angle. In the summer, the opposite is true: cool air that lingers at the floor can be drawn up by the same fan, as long as the tilt (or direction) of its blades are reversed. Whatever the season, it makes sense to operate a small fan motor or two in order to reduce your continuous or frequent reliance upon your larger, more energy-demanding HVAC system.