具有大型开放空间（如中庭）的建筑需要烟雾管理系统。自然排烟在北美并不常见，但在新的建筑设计中，将其与利用自然通风的可持续方面结合起来，这一点正在得到更多的考虑，而且如果能够证明其可靠，也可以节省资金。本文讨论了以下因素的影响:风；火灾烟羽的温度；自然排烟的烟囱效应。本文还介绍了CFD建模，说明了4层中庭和8层中庭的这些影响。结果表明，在无烟囱效应的静风条件下，以及在寒冷的室外温度下，自然排烟性能良好。 在室外温度非常高的情况下，反向烟囱效应会导致整个高大中庭的烟雾临时熏蒸。在频繁发生的大风条件下，较高的补充空气速度可能会导致整个中庭的烟雾混合不良，因为自然通风方案有很大面积的开放式入口和出口。引文:伊利诺伊州芝加哥ASHRAE会议论文

Buildings with large open spaces such as an atrium require a smoke management system. Natural smoke venting is not common in North America but it is receiving more consideration in new building design to integrate with sustainable aspects that utilize natural ventilation and also for the reason that, if it can be shown to be reliable, it can save money. This paper discusses the effects of: wind; temperature of the fire smoke plume; and stack effect for natural smoke venting. It also presents CFD modeling illustrating these effects for a 4-story atrium and an 8-story atrium. The results show that natural smoke venting performs satisfactorily during calm wind conditions without stack effect and also during cold outdoor temperatures. With very hot outdoor temperatures reverse stack effect can cause temporary fumigation of smoke throughout a tall atrium. During frequently occurring windy conditions higher make-up air speeds can cause adverse mixing of smoke throughout an atrium since natural venting schemes have significant area of open inlets andoutlets.