The ventilation effect of roof louver vent is actually affected by several major factors. As a professional smoke vents manufacturer, Mcwell will introduce it.

1. "Effective area" is the ventilation cross-sectional area of ​​the internal dimensions of the roof louver vent (in fact, this is the roof ventilation skylight "throat" in the sense). The effective ventilation area is large, the corresponding flow coefficient is large, and the ventilation performance is naturally good. On the contrary, even if the size of the hole is large and the design specifications cannot meet certain requirements, its ventilation performance will not be high. On the contrary, materials are wasted in vain and become "unventilated ventilation skylights."

Some informal small manufacturers on the market blindly fight for low prices, do not consider the overall structure of the structure, and save on the frame material. The specifications of the ventilation skylights are greatly compressed, only to reduce costs, and do not consider the ventilation of the natural roof ventilation. As a result, many users often "understood" because they didn't understand this, and regretted it after actually putting it into use.

2. "Structural ventilation resistance" can be easily compared according to the vortex and circumvention forms of the ventilation process. For example, natural vent of the same size have three forms of ridged, horizontal and V-shaped weatherproof panels. Obviously V-shaped It has the function of diversion to reduce the vortex resistance, and it must be well ventilated. Of course, it depends on the V-shaped form and angle.

3. Overlapping size of rainproof board. For roof ventilation skylights of the same size, large overlap of rain shields and large ventilation flow, the ventilation resistance will inevitably increase, resulting in more dynamic losses during air circulation, and naturally low ventilation performance.