Revamping for better indoor air quality in housing: a rental house renovation in ho chi minh city, vietnam

Over the past decade, the population of Ho Chi Minh City (HCMC) has doubled, resulting in a rise in low-income hostels. Rental homes for low-income families are usually small, ranging from 12 to 15 square meters, serving as a multi-purpose space. This type of accommodation is the most suitable option for those who cannot afford larger housing. This article aims to assess the effect of ventilation-related renovations on indoor air quality through a case study of a rental house in HCMC. Fieldwork was conducted to collect information on the house's original state, followed by renovations. Air pollutants, such as CO2, CO, PM2.5, and TVOC, were measured before and after renovation. Further analysis was conducted to identify factors that could enhance ventilation conditions in the house. The findings indicated that using exhaust fans with louvers and frequently opening doors and windows significantly improved indoor air quality. Therefore, mechanical ventilation is a simple and effective intervention to improve indoor air quality in tiny homes, especially near areas where residents sleep and have at least one motorbike.