PRODUCT DESCRIPTION The Premium 4 fan packs a mighty punch; don’t be deceived by its diminutive size, sitting at just 199mm high, our Premium 4 fan operates at a lower temperature and really blows hot air – FACT. Our innovative Premium 4 Fan features a uniquely engineered design that boasts an advanced radiating fin to generate maximum airflow, with up to 70% more air flow than competitor products. Designed to start at a temperature as low as 50°C - when ambient temperature is around 10°C - the fan requires no batteries or external power. Heat is conducted though the base of the fan and converted to electricity which powers the fan motor. With a durable, hard wearing black anodised finish, the fan automatically slows and stops as the heat from the stove reduces.