Almost every central air home lacks sufficient ventilation. Some rooms may be more in need than others. Even with well-designed cooling systems, there is usually at least one room in the house that lacks proper airflow. That’s bad airflow! Even the best homes have it. The Cyclone Booster Fan PLUS boosts the air from the vents outward into the rooms where it is needed most, making every room in your home equally comfortable, exactly the temperature set.