PDF(Pubmed)
Abstract：
BACKGROUND: Dilution ventilation by enhancing fresh air intake has been prescribed to reduce airborne infection spread during the COVID-19 pandemic. This is all the more important in assembly spaces like auditoriums. Premier technology institutes have large campuses with large auditoriums for academic and cultural events in India. These institutes serve as role models for society, where gatherings are essential, but there is also the possibility of transmission of all airborne respiratory infections, including tuberculosis, into the community. The fresh air taken in should also be filtered for pollution to prevent other lung issues.
OBJECTIVE: Fresh air intake and filtration have been studied in order to understand whether the outside air supplied indoors is filtered for PM2.5, which is a major ambient polluter in India. Settings and design/methods: In this study, the Right to Information Act of 2005 has been used to obtain first-hand information from the institutes with respect to the heating, ventilation, and air conditioning (HVAC) systems in their auditoriums. Twelve of the 19 institutes fall in cities with non-attainment of ambient air quality standards.
RESULTS: Eleven out of all those had recently integrated fresh air supply, and six replied in the negative. Only one out of all of them had appropriate filters.
CONCLUSIONS: This study highlights the need for a possible trade-off between the use of air conditioners for thermal comfort + assumed protection against PM2.5, which is the switching off of air conditioners and manually opening up windows and using fans for ventilation. Indian HVAC design for gathering spaces, especially educational institutes, needs to factor in fresh air for dilution ventilation as well as PM2.5 filtration.
OBJECTIVE: Fresh air intake and filtration have been studied in order to understand whether the outside air supplied indoors is filtered for PM2.5, which is a major ambient polluter in India. Settings and design/methods: In this study, the Right to Information Act of 2005 has been used to obtain first-hand information from the institutes with respect to the heating, ventilation, and air conditioning (HVAC) systems in their auditoriums. Twelve of the 19 institutes fall in cities with non-attainment of ambient air quality standards.
RESULTS: Eleven out of all those had recently integrated fresh air supply, and six replied in the negative. Only one out of all of them had appropriate filters.
CONCLUSIONS: This study highlights the need for a possible trade-off between the use of air conditioners for thermal comfort + assumed protection against PM2.5, which is the switching off of air conditioners and manually opening up windows and using fans for ventilation. Indian HVAC design for gathering spaces, especially educational institutes, needs to factor in fresh air for dilution ventilation as well as PM2.5 filtration.
摘要：
背景：在COVID-19大流行期间，已规定通过增加新鲜空气吸入来稀释通气，以减少空气传播的感染传播。这在像礼堂这样的装配空间中更为重要。一流的技术学院在印度拥有大型校园和大型礼堂，以举办学术和文化活动。这些机构是社会的榜样，聚会是必不可少的，但也有可能传播所有空气传播的呼吸道感染，包括肺结核,进入社区。吸入的新鲜空气也应过滤污染，以防止其他肺部问题。
目的：已经研究了新鲜空气的进气和过滤，以了解室内供应的外部空气是否被过滤了PM2.5，PM2.5是印度的主要环境污染者。设置和设计/方法：在这项研究中，2005年的《知情权法》已被用来从各机构获得关于供暖的第一手资料，通风,和空调（HVAC）系统在他们的礼堂。19个研究所中有12个位于未达到环境空气质量标准的城市。
结果：在所有最近整合了新鲜空气供应的人中，有11人，六个回答是否定的。他们中只有一个有合适的过滤器。
结论：这项研究强调了在使用空调以获得热舒适与假定的PM2.5防护之间进行权衡的必要性，即关闭空调并手动打开窗户并使用风扇进行通风。印度暖通空调设计的聚集空间，尤其是教育机构，需要考虑新鲜空气进行稀释通风以及PM2.5过滤。
目的：已经研究了新鲜空气的进气和过滤，以了解室内供应的外部空气是否被过滤了PM2.5，PM2.5是印度的主要环境污染者。设置和设计/方法：在这项研究中，2005年的《知情权法》已被用来从各机构获得关于供暖的第一手资料，通风,和空调（HVAC）系统在他们的礼堂。19个研究所中有12个位于未达到环境空气质量标准的城市。
结果：在所有最近整合了新鲜空气供应的人中，有11人，六个回答是否定的。他们中只有一个有合适的过滤器。
结论：这项研究强调了在使用空调以获得热舒适与假定的PM2.5防护之间进行权衡的必要性，即关闭空调并手动打开窗户并使用风扇进行通风。印度暖通空调设计的聚集空间，尤其是教育机构，需要考虑新鲜空气进行稀释通风以及PM2.5过滤。
