防烟楼梯间前室或合用前室，利用敞开的阳台、凹廊或前室内不同朝向的可开启外窗自然排烟时，该楼梯间可不设排烟设施。 利用建筑的阳台、凹廊或在外墙上设置便于开启的外窗或排烟进行无组织的自然排烟方式。
When the front room or shared front room of the smoke-proof staircase uses the open balcony, concave corridor or the openable external windows with different directions in the front room to smoke naturally, the staircase may not be provided with smoke exhaust facilities. The balcony, concave gallery or external wall of the building shall be provided with external windows or smoke exhaust for unorganized natural smoke exhaust.
自然排烟应设于房间的上方，宜设在距顶棚或顶板下800mm以内，其间距以排烟口的下边缘计。自然进风应设于房间的下方，设于房间净高的1/2以下。其间距以进风口的上边缘计。内走道和房间的自然排烟口，至该防烟分区最远点应在30m以内。自然排烟窗、排烟口中聚氨酯软管 PVC软管 隔离墩模具 u型槽模具 护坡模具 pvc输送带 尼龙输送带 天津除甲醛 北京除甲醛 、送风口应设开启方便、灵活的装置。
Natural smoke exhaust shall be set at the top of the room, preferably within 800mm from the ceiling or roof, and the distance shall be calculated by the lower edge of the smoke exhaust port. The natural air inlet shall be set below the room and below 1 / 2 of the clear height of the room. The spacing is calculated by the upper edge of the air inlet. The farthest point from the natural smoke outlet of the internal walkway and room to the smoke control zone shall be within 30m. The natural smoke exhaust window, smoke outlet and air supply outlet shall be equipped with convenient and flexible devices.