Feature: Upgrade Wall Mounted Double End Chimney Fan: Higher airflow: It has a motor specially designed for this furnace fan and double ends with 12 blades providing a very wide heat flow distributing the heat from the furnace more efficiently and very Raises room temperature quickly suitable for most fireplaces. Energy Saving Oven Fan:No battery or electricity required. It is powered by the heat generated by the fireplace or fireplace and directed to the bottom of the fan to drive the blades. The higher the oven temperature the faster the guide vanes rotate. No battery or electricity required eco-friendly low temperature start low fuel consumption up to 17% fuel efficiency enjoy the heat from the stove faster. New design save space: When installed on the chimney you can choose the appropriate angle and appropriate height and the space utilization rate is significantly improved. Silent operation of furnace fan: The furnace fan runs less than 25 decibels which is very quiet. You can hardly hear the sound. It improves the circulation of hot air in the room which increases comfort. Oven fan operating temperature: The operating temperature is approx. 50C to 350C (122F to 662F) fan speed automatically adjusts to oven temperature. Conversion is highest when the temperature reaches about 250-300C. Specification: *Material: Aluminum *Colour: Black *Number of fan blades: 12 pieces double heads *Operating temperature range: 122F to 662F (50C to 350C) *Air volume: 160-200 *Noise: 25db Speed: 1400rpm *Product size: length: 225MM (8.9 inches) height: 110MM (4.3 inches) fan diameter: 110MM (4.3 inches) *Power supply: Thermoelectric module