The existing knowledge on the effect of air cleaners in reducing different indoor impurities and health symptoms real-life applications is still insufficient. PUHHO study aimed to fill this gap with a blinded intervention 18 primary school classrooms. was conducted during 8 weeks 2 without cleaner, 3 cleaner full operation (filtration) moderate airflow (200 - 400 m /h) sham (air blowing filtrat...

A successful Indoor Air Quality (IAQ) surveillance plan is essential for healthy and safe workplaces; yet it is costly to sample all air pollutants of the entire community. In Hong Kong, a voluntary IAQ certification scheme for workplaces proposes the acceptable concentration levels of nine common indoor air pollutants, namely carbon dioxide (CO2), carbon monoxide (CO), respirable suspended par...

The increasing prevalence of atopic dermatitis (AD) is associated with variations in indoor environments. In Korea, many inner walls of homes are covered with wallpaper: such walls emit indoor air pollutants, including volatile organic compounds (VOCs) and formaldehyde. This randomized, double-blind study investigated the effects of wallpaper on indoor air quality and AD. Thirty-one children (a...

The emission rates of volatile organic compounds (VOCs) were measured to investigate the emission characteristics of five types of common furniture products using a 5 m(3) size chamber at 25°C and 50% humidity. The results indicated that toluene and α-pinene are the most dominant components. The emission rates of individual components decreased constantly through time, approaching the equilibri...

Healthy building design is an emerging field of architecture and engineering. Indoor air quality (IAQ) inevitable factor that should be considered in healthy due to its demonstrated links with human health well-being. This paper proposes integrate IAQ prediction into by developing a simulation toolbox, termed i-IAQ, using MATLAB App Designer. Within the users can input information layout wall-o...

Vat photopolymerization (VP), a type of additive manufacturing process that cures resin to build objects, can emit potentially hazardous particles and gases. We evaluated two VP technologies, stereolithography (SLA) digital light processing (DLP), in three separate environmental chambers understand task-based impacts on indoor air quality. Airborne particles, total volatile organic compounds (T...

Indoor air quality in schools has a direct impact on the performance and wellbeing of students. In 2020, health emergency required reconsideration ventilation conditions indoor spaces, especially for educational buildings. This paper advances previous investigations to identify affordable, sustainable, healthy designs refurbishment new construction schools, analysing design parameters buildings...

Several studies have shown that plants with a variety of performance categories can improve indoor air quality (IAQ). In addition, it has positive impacts on occupants’ concentration ability, work efficiency, job satisfaction, mental health, stress reduction, and sense well-being. However, there is few research focused the impact towards physical environment. Therefore, this study performs seve...