Pipe ventilating fan installation method
The pipeline type is concealed in the pipeline, the wall is side suction type, different, and the pipeline ventilation fan is negative pressure suction, that is, the intake pressure is less than atmospheric pressure, and the wall is atmospheric pressure suction, that is, indoor atmospheric pressure. The pressure is also different, and the running flow is also different. This can't be used universally. Of course, it is OK to install it.
You can fill the gap with a soft material, specialize in customizing an aluminum alloy shelf, hit a few bolt holes, and hold the ventilation fan.
The exhaust hole is made according to the size of the fan. The four sides or the circle should be slightly larger than the fan size for installation. The sides are 2 cm (20 mm). Anyway, the gap should be filled with soft material or paint (waterproof). The hole is not very regular.
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