The fans for pellet fireplaces can be:
The initial ignition of the pellets is done by hot air, which is sucked around the lighter in the combustion chamber by means of a smoke extractor. It also provides the air needed for combustion by suction through an air duct Ø 40 mm from the room or the outside atmosphere. When supplying air from the room, there must be a supply of outside air. The flue gases are sucked from the combustion chamber by means of a smoke extractor and are brought to a flue Ø 80 mm.
The centrifugal and tangential fan are used to inject air into the pellet stove, creating a constant air flow with different flow rates.