Ridge ventilator is also often called natural ventilator in the industry. They are ventilation equipment used on steel-structured workshops for ventilation, daylighting, fire-fighting smoke exhaust, heat preservation, etc.. They are now widely used in electric power, steel, metallurgy, chemical industry, etc. and other industries and large supermarkets, shopping malls, stations, docks and other public buildings. For ridge ventilator, its ventilation effect is one of the indicators that users care more about and the ventilation volume of smoke exhaust ventilator is affected by the size of its throat.

What is the throat size of the natural vent:

Before the completion of the of the steel structure factory building, holes for ventilation will be reserved on the roof slabs. The throat size of the smoke vent roof refers to the size of the holes reserved for the roof slab.

Natural ventilation systems are classified according to the size of the throat:

The throat size is divided into different sizes. The ventilator with a size of 600mm-1200mm is a small-throat ventilation skylight; the ventilator with a size of 1200mm-9000mm is a large-throat ventilation skylight.

Features of large and small throat natural roof ventilation:

The throat size is small, the corresponding volume is relatively small, the smoke hatch skylight is light in weight, the load carried by the factory building is relatively small, there is no need to install the base, the overall frame is formed, and the frame stability is good; the larger the throat size, the greater the corresponding ventilation volume, and the better the ventilation effect. However, due to the larger volume of the ventilator, the roof smoke vent has a large dead weight load, and the plant bears a relatively large load, which requires an additional base.