A study on evaluation of indoor air quality at residential houses in Hanoi (Viet Nam)
1Department of Thermal Engineering, Hanoi University of Science and Technology, Viet Nam
*Author to whom correspondence should be addressed:
E-mail: dung.trinhquoc@hust.edu.vn (DQT)
E-mail: dung.trinhquoc@hust.edu.vn (DQT)
Received: March 20, 2025 | Revised: July 12, 2025 | Accepted: August 23, 2025 | Published: December 2025
Abstract
Indoor air quality significantly impacts human health and is a major contributor to respiratory and cardiovascular diseases. This study aimed to assess and analyze indoor pollution by measuring environmental parameters inside homes in Hanoi, the capital city of Vietnam, in conjunction with homeowner surveys. The findings indicate that indoor air quality is influenced by the flow and quality of the clean air supply and is further compromised by pollutants generated from human activities. Key pollutants identified include fine particulate matter (PM2.5), carbon dioxide (CO2), total volatile organic compounds (TVOC), and mold, which tend to accumulate in high concentrations within indoor environments, leading to air quality degradation. Based on the results, heat recovery ventilation (HRV) is recommended to use for improving indoor air quality and occupant comfort as well as significantly reduces the energy consumption of air conditioning systems during the summer months.
Keywords
Air conditioning; CO2 concentration; Heat recovery; Indoor air quality (IAQ) PM2.5 particulate matter; TVOC concentration
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