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Window - type sound - proof ventilator: It can be added to the window and is divided into two types: natural and electric. The natural ventilator uses a unique S - shaped channel to absorb noise and dust, achieving ventilation and sound insulation. The electric ventilator, in addition to ventilation and sound insulation, is equipped with an air purification device, which is energy - saving and easy to operate.
Wall - type sound - proof ventilator: It is installed on the wall by making holes in the wall and has a filter screen. One type adopts German sound - proof ventilation technology, which can extract harmful indoor air to the outside and is equipped with an anion air purification system. The other is a purification and sound - proof fresh air ventilator, integrating the functions of an air purifier, a sound - proof ventilator, and a wall - mounted fan, with advantages such as two - way air exchange and multiple - layer filtration.