The Dyson Hot Cool fan heater provides the fastest whole room heating in winter, and provides high velocity air to cool you in summer. Conventional fan heaters claim to be effective cool air fans as well. But many have low airflow and velocity—so they’re not. The Dyson Hot Cool fan heater uses Air Multiplier technology to generate high airflow and velocity to cool you effectively, and for long-range heat projection for efficient whole room heating. And there are no blades–just an uninterrupted stream of smooth air.