What are the similarities and differences between electric fans and ventilator?

electric fan: it is mainly used to cool down and can only be used in summer; Placed in an empty room or hall, it is beneficial to the heat dissipation of the motor and is rarely affected by the external environment. Moreover, attention should be paid to safety, which is easy to be touched by people (children) and requires high direct protection; Attention should be paid to the hazards of contact

Ventilator: Keep the air circulation clean, and install it in the harsh environment such as wall or ceiling interlayer, and the heat dissipation of the motor is limited, or it is easily affected by sunshine, wind and rain. Installed in a high place, it is not easy to be touched by people, and the direct protection requirements are low. Close-fitting installation requires attention to the influence of body vibration; Pay attention to waterproof, dust, sand and sunshine.