Converging evidence reports that the probability of vertical transmission patterns via shared drainage systems, may be responsible for the huge contactless community outbreak in high-rise buildings. Publications indicate a faulty bathroom exhaust fan system is ineffective in removing lifted hazardous virus-laden aerosols from the toilet bowl space. Common strategies (boosting ventilation capability and applying disinfection tablets) seem unsustainable and remain to date untested. Using combined simulation and experimental approaches, we compared three ventilation schemes in a family bathroom including the traditional ceiling fan, floor fan, and side-wall fan. We found that the traditional ceiling fan was barely functional whereby aerosol particles were not being adequately removed. Conversely, a side-wall fan could function efficiently and an enhanced ventilation capability can have increased performance whereby nearly 80.9% of the lifted aerosol particles were removed. There exists a common, and easily-overlooked mistake in the layout of the bathroom, exposing occupants to a contactless vertical pathogen aerosol transmission route. Corrections and dissemination are thus imperative for the reconstruction of these types of family bathrooms. Our findings provide evidence for the bathroom and smart ventilation system upgrade, promoting indoor public health and human hygiene.

汇聚的证据表明，通过共用排水系统的垂直传播模式的可能性可能是高层建筑中大量非接触式社区爆发的原因。出版物表明，有故障的浴室排气扇系统无法有效去除马桶空间中带走的携带危险病毒的气溶胶。常见的策略（提高通风能力和使用消毒片）似乎不可持续，并且迄今为止仍未经过测试。我们使用仿真和实验相结合的方法，比较了家庭浴室的三种通风方案，包括传统的吊扇、落地扇和壁扇。我们发现传统的吊扇几乎无法正常工作，因此无法充分去除气溶胶颗粒。反过来，侧壁风扇可以有效运行，增强的通风能力可以提高性能，从而去除近 80.9% 的悬浮气溶胶颗粒。卫生间的布局存在一个常见且容易被忽视的错误，即使居住者暴露在非接触式垂直病原体气溶胶传播途径中。因此，改正和传播对于重建这些类型的家庭浴室势在必行。我们的研究结果为浴室和智能通风系统升级提供了证据，促进了室内公共卫生和人体卫生。使居住者暴露在非接触式垂直病原体气溶胶传播途径中。因此，改正和传播对于重建这些类型的家庭浴室势在必行。我们的研究结果为浴室和智能通风系统升级提供了证据，促进了室内公共卫生和人体卫生。使居住者暴露在非接触式垂直病原体气溶胶传播途径中。因此，改正和传播对于重建这些类型的家庭浴室势在必行。我们的研究结果为浴室和智能通风系统升级提供了证据，促进了室内公共卫生和人体卫生。