Impact of the air filtration on indoor particle concentration by using combination filters in offices building

Kabrein, Hashim; Hariri, Azian; Leman, Abdul Mutalib; Noraini, Nor Mohd Razif; Yusof, Mohammad Zainal; Afandi, Azizi

doi:10.1088/1757-899x/243/1/012051

Cited by 3 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This dilutes or removes pathogen-containing aerosols, thus reducing the inhaled dose to occupants [1]. Therefore, ventilation system design can be used as an engineering control method to decrease indoor particle concentration and decrease disease transmission risk [2]. However, buildings with a low air exchange rate, inefficient ventilation design, or a high occupant density have a much higher possibility for airborne infection.…”

Section: Introductionmentioning

confidence: 99%

Room HVAC Influences on the Removal of Airborne Particulate Matter: Implications for School Reopening during the COVID-19 Pandemic

et al. 2021

View full text Add to dashboard Cite

(1) Background: Many schools and higher education settings have confronted the issue of reopening their facilities after the COVID-19 pandemic. In response, several airflow strategies spanning from adding portable air purifiers to major mechanical overhauls have been suggested to equip classrooms with what is necessary to provide a safe and reliable environment. Yet, there are many unknowns about specific contributions of the building system and its design and performance on indoor air quality (IAQ) improvements. (2) Methods: this study examined the combined effect of ventilation type, airflow rates, and filtration on IAQ in five different classrooms. Experiments were conducted by releasing inert surrogate particles into the classrooms and measuring the concentrations in various locations of the room. (3) Results: we showed that while the distribution of particles in the space is a complex function of space geometry and air distribution configurations, the average decay rate of contaminants is proportional to the number of air changes per hour in the room. (4) Conclusions: rooms with a central HVAC system responded quicker to an internal source of contamination than rooms with only fan coil units. Furthermore, increasing the ventilation rate without improved filtration is an inefficient use of energy.

show abstract

Section: Introductionmentioning

confidence: 99%

Room HVAC Influences on the Removal of Airborne Particulate Matter: Implications for School Reopening during the COVID-19 Pandemic

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Ventilation system design can be used as a tool to decrease indoor particle concentration and reduce the risk of infectious disease transmission (Kabrein et al, 2017). With the increasing amount of time people spend indoors, proper ventilation systems are important, whether in an office building, classroom, or home.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Assessing Mitigation Strategies to Reduce Potential Exposures to Indoor Particle Release Events

Valkinburgh

Nafchi

Mousavi

et al. 2022

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

Airborne transmission is a major concern for many infectious pathogens, including the novel coronavirus. Ventilation is the principal engineering method used to control airborne health hazards in buildings. Understanding potential air pollution hazards are a particular concern for highly populated indoor environments, such as workplaces and classrooms. This study discusses the results of ventilation testing in a university classroom which contains two fan coil units as the primary HVAC system. A particle nebulizer was used to release aerosol particles into the air, and multiple particulate measuring devices were placed strategically around the room to measure the particle concentration over time. An exponential particle decay rate is determined from the data and converted to a particle concentration half-life, which ranged from over 60 minutes down to under 10 minutes. We then assess how quickly the particles were removed by ventilation systems with varying conditions, including the addition of both high-and low-cost portable mitigation devices into the classroom. Our results indicate that a low-cost unit, made of a simple box fan with a MERV13 filter taped to it, may perform as well at removing particles from a room as a high-cost HEPA filter unit, owing to a tradeoff between filtration efficiency and the number of air changes per hour. As is observed in numerous other studies, the particle concentration half-life in each classroom setup decreases as the mechanical air changes per hour increases from about 1.3 to 9.3. These results are used to evaluate the potential personal exposure risk associated with various classroom ventilation setups. Our results indicate that, when compared to running the fan coil units on low fan speed, operating on a high fan speed reduces potential exposure by 22% and using a portable HEPA filter in the room reduces potential exposure by 66%.

show abstract

“…• Therefore, an air purifier is a must for your home, workspace, and car. An air purifier can provide safeguards to humans from the following [44][45][46].…”

Section: Why Do We Need An Air Purifier? and What Are The Benefits Of...mentioning

confidence: 99%

Study of Modern Air Purification and Sterilization Techniques

Shukla¹,

Koul²,

Babu³

2022

EESRJ

View full text Add to dashboard Cite

Very few studies are available on workable air pollution treatment, especially for airborne microbiota on human health. The present study has attempted to summarize the commonly known forms of air pollution, airborne viral, bacterial, and fungal attack, their possible effects on human health, and possible treatment. A testing rig is also designed and developed for air purification. Earlier, air purifiers were used to deliver clean air by treating particulate matters (PM) only, but due to the pandemic situation, i.e., COVID-19, air purifier units are expected to treat potentially harmful microbiota as well. In the present study, HEPA (High-Efficiency Particulate Air) filter is studied in combination with conventional mechanical filters. It is observed to be very efficient in trapping and neutralizing viruses and bacteria when used with sterilization techniques. This article also highlights the critical aspects required to be examined for the installation of air purification unit.

show abstract

Impact of the air filtration on indoor particle concentration by using combination filters in offices building

Cited by 3 publications

References 15 publications

Room HVAC Influences on the Removal of Airborne Particulate Matter: Implications for School Reopening during the COVID-19 Pandemic

Room HVAC Influences on the Removal of Airborne Particulate Matter: Implications for School Reopening during the COVID-19 Pandemic

Assessing Mitigation Strategies to Reduce Potential Exposures to Indoor Particle Release Events

Study of Modern Air Purification and Sterilization Techniques

Contact Info

Product

Resources

About