Ceiling ventilation fans and external rotor motors have stable operating performance, large inertia, stable operation, low wear, long life, and high manufacturing technology and conditions. The successful use of the external rotor motor marks the introduction of a new technological era for the ventilating fan. Yao's safety metal ventilation fan also adopts a large wind wheel design, with greater air volume at the same speed; ultra-thin body, beautiful appearance; strong fire resistance; each product has been tested for computer balance performance. Yaoan's ventilation fans have excellent performance and unparalleled advantages. They are a technology replacement.

The ventilation method of Yao'an ventilating fan is exhaust type. The exhaust type enters the air from the natural air inlet, and exhausts the dirty air through the ventilation fan.

There are two types of ventilating fans in Yaoan: one is a plastic pipe ventilating fan, and the other is an all-metal ventilating fan.

Yao'an ventilation fans require different ventilation volume and frequency in different places. The amount of fresh air required by a person or per square meter is called the required ventilation rate. The number of times the fresh air is changed in one hour is called the number of air changes.

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