Recently, infectious diseases like COVID-19 have prioritized indoor air quality (IAQ), highlighting the critical importance of effective ventilation. Concurrently, deteriorating outdoor air quality caused by particulate matter (PM) significantly hinders natural ventilation. Window-Type ventilation systems offer a solution by mechanically introducing outdoor air while mitigating pollutant ingress via filtration. However, installation requires partial window opening, potentially compromising the original fenestration's airtightness and sound insulation. A regulatory gap exists, as current standards lack clear definitions for these systems, focusing narrowly on ventilation capacity. Therefore, this study proposes a comprehensive methodology to evaluate the multifaceted performance of window-type systems, assessed via pilot experiments. The evaluation framework covers ventilation, IAQ, airtightness, sound insulation, and view quality, adapting relevant ISO and KS standards. Performance was compared between two scenarios: a baseline without the device and an operational state with the installed system. Results confirm the system effectively accelerates CO2 decay and improves overall IAQ. Furthermore, key metrics such as airtightness and sound insulation are largely maintained. A trade-off was observed in the reduction of transparent window area. In conclusion, this study presents a validated methodology for the integrated assessment of window-type ventilation systems. Findings underscore the need for standardization and inform the development of advanced systems balancing ventilation efficacy with critical building performance factors.
Hong et al. (Tue,) studied this question.