In order to improve the ventilation effect in the large workshops, most of them are equipped with different types and standards of natural ventilator, and ventilating buildings, which have achieved unexpected effects. For workshops that require natural ventilation at any time, low-profile ventilator with adjustable sashes should be used. 

In general air buildings, due to the effect of atmospheric wind, air flows back into the windows on the wind-bearing surface, thus reducing the exhaust effect of the natural ventilator. In order to eliminate the backflow phenomenon of the natural vent, the method of adding a windshield in front of the window is generally selected to form an artificial negative pressure zone, so that the product air floor can be changed into a windshield skylight.

It can be seen that the wind deflector has a very large effect in improving the aerodynamic function of the ventilation skylight. Clarifying the influence of the relative size and device orientation of the wind deflector on the ventilation function of roof smoke vent is an important issue in industrial construction and ventilation planning. A series of experiments and research work have been carried out on the relative dimensions and device orientation of the windshield of a typical low-profile natural ventilator.

The natural lighting and ventilation of the factory building generally does not require piping systems and ventilation equipment like mechanical ventilation. Only by opening the ventilation skylights in the proper position of the factory building, natural ventilation can be completed under the effects of heat pressure, wind pressure or a combination thereof. Therefore, the use of natural ventilation skylights on the roof of the factory building is an economical ventilation method. Smoke ventilation is an important element that affects the effect of natural ventilation. It is of great significance to study the way of sheltering skylights with good aerodynamic functions and relatively simple structures, and to equip skylights reasonably. It is of great significance to strengthen the natural ventilation of the plant and reduce the construction cost.