describe: This wood-burning stove heating fan is silent, directly suspended, easy to use, energy efficient, and has overheat protection. And can be applied to a wide temperature range. feature: Automatic adjustment: the fireplace fan can be started automatically, and the speed can be adjusted according to the furnace temperature. Consumption: Low consumption, high efficiency, can increase room temperature by 41%, save costs by up to 16%, no battery or power supply, more environmentally friendly. The stove's thermoelectric fan uses no batteries or electricity, increasing the stove's heating efficiency and allowing warm air to flow through your room faster. Working principle: Thermoelectric furnace fans use thermoelectric technology to convert temperature differences into electricity. There is a unique thermoelectric module in the center of the fan. When heated, the module creates hot and cold sides that allow electrons to flow into the module and generate electricity to operate the fan. This is also known as the Seebeck effect Note: Furnace fans do not bring about a direct temperature increase, but only a tool to accelerate heat transfer from the chimney. Make sure the stove fan is placed on a flat surface. Specification Power supply equipment: thermoelectric module (thermal power supply) Material: aluminum alloy Airflow: 203CFM Initial temperature: 40 Working temperature: 50-400 Noise level: 15-18db Recommended distance: 10-15CM/4-6inch 1*fireplace fan