Existing building retrofitting for Indoor PM2.5 Concentration Control on Smog Days: Case study in China

摘要

Severe smog days in many parts of developing countries, such as China and India, have drawn worldwide attention. This study aims at integrating various building retrofitting methods of existing buildings to control indoor PM2.5 concentrations. Methods are such as airtightness improvement, room pressure control, recycling air filtration, and combinations of the above. The study verifies the effectiveness of each control method to reduce the indoor PM2.5 concentration below 25 ug/m3 in building. Measurements are conducted for different outdoor particle concentration scenarios under different control strategies at an apartment in Shanghai, China. This is the first time that various existing residential building retrofitting strategies are integrated jointly and different control methods are tested to ensure indoor air quality under different outdoor conditions. The results and conclusions can be used in many parts of the worlds, when building occupants choose proper retrofitting methods to control their indoor air quality.