Exhaust air, smoke exhaust and air supply fan type selection, exhaust fan, exhaust fan optional centrifugal fan or high temperature axial fan. The common centrifugal fan can be used in the ventilation pipe of Shandong to meet the requirements of exhaust and smoke exhaust, but the centrifugal fan with large air volume can only be installed on the ground
占地较大，需要较大机房，高温轴流风机为消防专用风机，也能满足在280℃ 烟温下运行30 min的要求， 而高温轴流风机体积小，一般可吊装，若设机房面积也小，实际工程设计中，往往采用高温轴流风机排烟。
Covers an area of large, large room temperature, axial flow fan for fire special fan, also can meet the 30 min running at 280 deg.c temperature and smoke, high temperature axial flow fan has the advantages of small size, can be lifted, if the room area is small, the actual engineering design, often using high temperature axial flow fan the exhaust smoke.
The ventilation mode of the basement of reasonable arrangement of exhaust pipe and exhaust outlet, usually used as fire exhaust, exhaust air duct and exhaust port; the underground layer considered by Lane natural ventilation, the other layer is composed of normal air ventilation system as fire system.
Each wind and smoke exhaust and air supply system should be set up into the air shaft, should be located in the ground clean, if there is a certain distance from the main building and better underground, gas fire impact will be small; if there is a certain distance from the ground and better building, the fire smoke effect will be small, the air outlet position should be higher than that of floor level, in order to reduce the influence of ventilation on the ground environment.
The smoke exhaust system division system should be combined with the zoning of building fire zoning into consideration, so as to have a smoke exhaust system for underground ventilation system, and will not appear across the fire smoke duct Fang District phenomenon. Therefore, when using a set of air duct, the system should meet the requirements of smoke exhaust in peacetime exhaust and fire.
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