Indoor Environmental Quality, Pupils’ Health, and Academic Performance

Version	Summary	Created by	Modification	Content Size	Created at	Operation
1		Oluyemi Toyinbo	--	3473	2023-08-31 10:11:37	\|
2	layout & references	Sirius Huang	Meta information modification	3473	2023-09-01 03:34:50	\|

This entry is adapted from the peer-reviewed paper 10.3390/buildings13092172

Indoor environmental quality (IEQ) relates to the conditions that exist within a building; these include indoor air quality (IAQ), thermal conditions, visual (e.g., lighting) and aural (e.g., noise) comfort, and their potential effects on building occupants. Classrooms have more students per square meter than other buildings such as offices, making them more crowded. Poor IEQ has been shown to influence learning and concentration, as well as impact the long-term health of students. A continuous classroom IEQ research review and appraisal are needed to summarize existing knowledge, which can help other researchers avoid research duplication and identify research gaps for future studies.

school ventilation thermal comfort mold and moisture cleanliness indoor environmental quality

1. Introduction

Primary school education is essential for children; this basic education is compulsory for all children in most countries of the world and requires them to spend several hours in schools. It is important to investigate the school environment, to know what might affect students’ learning, health, and wellbeing. Pupil health encompasses the physical, mental, and emotional well-being of students, which is vital for optimal learning and personal development, while academic performance pertains to a student’s attainment and accomplishments in educational pursuits, encompassing their grades, test results, engagement in class, and overall grasp of the curriculum ^[1].

2. Ventilation and IEQ in Schools

Ventilation involves the removal of noxious indoor air and the supply and distribution of fresh (outdoor) air into the indoor environment. Ventilation is important for ensuring a favorable IEQ as it dilutes and removes pollutants, odors, and excessive moisture, while providing occupants with fresh air to breathe ^[2]^[3]^[4]^[5]^[6]^[7]. Ventilation is achieved through the implementation of various types of ventilation systems, including natural ventilation, mechanical ventilation, or a combination of both, known as hybrid/mixed-mode ventilation.

Natural ventilation relies on outdoor wind conditions and thermal buoyancy to direct air into a building through specifically designed openings, such as trickle ventilators, doors, and windows ^[8]^[9]^[10]. This implies that minimal or no electrical energy is required during its operation ^[10]^[11]. This reduces the energy cost associated with the day-to-day operation of buildings, especially public facilities like schools, resulting in potential savings of up to 30% of total energy ^[9] and a remarkable 78% reduction in cooling energy ^[12]. This invariably promotes environmental sustainability, as the system emits a limited amount of carbon dioxide (CO₂) and requires only a small space for its operation ^[12]. The system, however, has its drawbacks, including a reliance on outdoor wind speed to ensure ventilation adequacy ^[13]^[14], sensitivity to climatic conditions affecting thermal comfort and ventilation rates ^[11]^[15]^[16], and its inability to condition outdoor air before introducing it indoors due to the lack of temperature and humidity control ^[9]. Additionally, they might introduce raw outdoor air with high (in tropical climates) or low (in temperate climates) levels of temperature, humidity, and particle loads, while offering less control over the airflow rates ^[17]^[18]. Mechanical ventilation comes in two forms: a mechanical exhaust-only ventilation system, where polluted or spent air is extracted mechanically while fresh air is introduced naturally into the indoor environment; or a mechanical supply and exhaust ventilation system that employs mechanical systems for both introducing fresh air and removing polluted air ^[19]^[20]. The use of mechanical systems helps increase ventilation rates, and they can be designed or adjusted to deliver a specific flow rate. Such systems can also include options for conditioning and purifying incoming air with cooling, dehumidification, and filtering equipment. However, it is important to note that mechanical ventilation is associated with energy consumption, which comes at a cost ^[6]. Another challenge with the use of mechanical ventilation in schools is the need for ongoing maintenance and adequate control by specialists to ensure that the required classroom ventilation rate is consistently met ^[21]^[22].

A hybrid or mixed-mode ventilation system combines both natural and mechanical ventilation, where mechanical ventilation is utilized only when natural ventilation falls short of meeting the required standards ^[23]. Ji et al. ^[24] suggested that employing hybrid ventilation in buildings is a practical approach to attaining a desirable IEQ while minimizing energy consumption. Additionally, some studies have associated mechanical ventilation with a higher incidence of sick building syndrome (SBS) ^[25]^[26]. SBS might not be as prevalent in naturally ventilated rooms, where a continuous exchange of outdoor and indoor air occurs. Mechanical ventilation systems that recirculate air can contribute to an increase in indoor microorganisms and other pollutants ^[26]. Additionally, they may also have dirty or contaminated units, such as those with as mold and bacteria growth in vent pipes. However, some other research has concluded the opposite. For example, Wallner et al. ^[27] found that mechanically ventilated rooms had an overall better IEQ when compared to naturally ventilated rooms. Additionally, Yang et al. ^[28] recommended the use of a mechanical ventilation system to improve ventilation rates in schools for better classroom IEQ. In another study, classrooms with natural ventilation exhibited poor air quality due to inadequate ventilation, resulting in a high concentration of CO₂ ^[29]. The study found that ventilation adequacy was linked to the type of ventilation system, with mechanical supply and exhaust ventilation systems exhibiting the highest ventilation rates.

In a Finnish school study by Toyinbo et al. ^[30], none of the classrooms with natural ventilation and mechanical exhaust-only ventilation systems met the Finnish building code ventilation rate of 6 L/s per student. Meanwhile, 52% of the schools with a mechanical supply and exhaust ventilation system type met the recommendation. In a Netherlands intervention study, classrooms that relied on natural ventilation had their IEQ improved with a CO₂-controlled mechanical ventilation system. After the intervention, the average classroom CO₂ concentration decreased from 1335 ppm (range: 763–2000 ppm) to 841 ppm (range: 743–925 ppm) ^[31]. Improving ventilation comes at a cost, but the resultant benefit of enhanced ventilation may outweigh the amount paid in terms of improved health outcomes, productivity, and reduced absenteeism.

Physical, biological, and chemical factors, as well as ventilation and the extent of human activities, all act to contribute to the levels of pollution in any given indoor environment ^[28]. A high concentration of CO₂ in classrooms reflects inadequate ventilation ^[32]^[33]. The number of occupants in a building has been associated with CO₂ concentration. For example, a school study by Scheff et al. ^[34] found a continuous relationship between classroom occupancy and CO₂ concentration; there was an increase in CO₂ concentration associated with high occupancy. Indoor CO₂ concentration is related to outdoor concentration and the metabolic CO₂ exhaled by occupants ^[35]^[36]. The concentration of CO₂ in exhaled air is 100 times that of inhaled air ^[37]. Occupant-generated CO₂ may sometimes result in indoor CO₂ concentrations exceeding the outdoor levels, especially in highly occupied buildings such as schools ^[32]^[38]^[39].

A common ‘rule of thumb’ has been to keep the indoor CO₂ concentration below 1000 ppm (e.g., ^[40]). While CO₂ concentrations lower than 5000 ppm are not associated with direct health effects, ASHRAE (American Society of Heating, Refrigerating, and Air-Conditioning Engineers) Standard 62.1 ^[41] associates CO₂ levels greater than 700 ppm above outdoor air levels (i.e., usually around 1000 ppm) with inadequate ventilation in terms of the removal of human bio-effluents (body odors). This can result in dissatisfaction among the people entering such rooms. Improving ventilation reduces indoor CO₂ levels ^[31]^[33], and the higher the CO₂ concentration indoors, the lower the ventilation rate per student. Some countries have recommended ventilation rates for classrooms. For example, the ventilation rate recommendation for classrooms in the U.S. (United States) is about 7.1 L/s per person ^[41], while that for Finnish schools is 6 L/s per person ^[42]^[43]. The ventilation recommendations for classrooms for some countries is based on classroom CO₂ concentration. The recommended limit for indoor CO₂ is 700 ppm above the outdoor level in Singapore ^[44]. Further information regarding ventilation, temperature, and other IAQ parameters for various countries can be found in the summaries provided by Toyinbo et al. ^[45] and Dimitroulopoulou et al. ^[46]. In addition, some countries only gave recommendation on how best to construct classrooms for better ventilation. For example, the National Building Code of Nigeria ^[47] suggests positioning windows directly opposite each other to facilitate cross-ventilation and ensure adequate airflow.

3. Thermal Comfort and IEQ in Schools

Thermal comfort relates to how people feel about the thermal conditions of their environment ^[48]. ASHRAE standard 55 ^[49] defines thermal comfort as a state of mind regarding a person’s thermal environment. In a typical application of the standard, it recommended that at least 80% of building’s occupants should feel thermally satisfied with their thermal environment, while 90% satisfaction is encouraged when a higher level of thermal satisfaction is desired in indoor spaces. According to Fanger ^[50] and Daghigh ^[51], six factors can influence people’s responses to their thermal environment: air temperature, mean radiant heat, air velocity, relative humidity, clothing thermal resistance, and metabolic rate. Thermal comfort is also influenced by factors such as the seasons of the year and location, age, gender, and individual adaptive characteristics ^[52]^[53]. Given the amount of time students spend in schools and the impact of thermal conditions on health and performance, ensuring their thermal comfort is essential ^[54]^[55].

Thermal comfort is closely linked to ventilation adequacy, particularly in temperate regions where energy-efficient buildings with tight construction are common. Increased ventilation has been shown to result in lower indoor temperatures, thus contributing to the thermal comfort of building occupants ^[51]^[56]. Ventilation with air conditioning appears to influence thermal comfort in the tropics rather than just adequate ventilation. This is because warm unconditioned air can be introduced into the indoor space, making students uncomfortable. A Nigerian school study confirmed this. In the study, most of the investigated classrooms had adequate ventilation, judging by their CO₂ concentration level. However, the lack of proper thermal insulation against solar radiation and the introduction of warm, unconditioned outdoor air into the classrooms adversely affected the thermal comfort experienced by the students ^[18].

Mechanically ventilated and air-conditioned rooms offer improved thermal comfort for occupants compared to naturally ventilated rooms ^[16]^[51]^[57]. This is primarily because controlling and adjusting natural ventilation systems can be challenging due to their dependence on outdoor wind speed and weather conditions ^[17]^[51]. For instance, a study conducted by Yang and Zhang ^[58] demonstrated that naturally ventilated rooms often fail to provide sufficient comfort to occupants and do not meet the recommended standards set by ASHRAE Standard 55. Similarly, Indraganti’s study ^[59] found that 60% of building occupants expressed thermal discomfort in naturally ventilated rooms. Even when Prajongsan and Sharples ^[60] improved natural ventilation in their study, thermal comfort only increased from 38% to 56%, which still fell short of the ASHRAE recommendation. Another study by Lu et al. ^[48] showed that 76% of respondents in naturally ventilated buildings preferred a cooler environment. Daghigh et al. ^[61] achieved thermal comfort, meeting ASHRAE Standard 55 in mechanically ventilated rooms, but the results changed when natural ventilation was substituted for mechanical ventilation in the same space. According to Brittle et al. ^[23], a hybrid ventilation system provides enhanced comfort and enables energy savings ranging from 21% to 39%.

4. Moisture and Mold in Schools

It is believed that the operation and maintenance of school facilities are often not funded as adequately as other types of buildings, such as offices. This lack of funding may lead to persistence of environmental problems ^[62]^[63]. Insufficient maintenance can result in the deterioration of building materials and systems, leading to failures in moisture control. Furthermore, school buildings may have areas that are prone to leaks, causing moisture damage that can contribute to the growth of microbial organisms ^[64]^[65]^[66]. A school study conducted by Cho et al. ^[67] found that classrooms with recent water leakage exhibited higher levels of dampness compared to those with only previous or no history of leakage. The study also found a linear association between dampness and the presence of culturable bacteria, with 63% of the examined classrooms exhibiting both dampness and mold. In a Danish study, moisture damage was reported in 49% of the sampled schools ^[68], while similar problems were identified in 20%, 41%, and 24% of schools in three other European countries (the Netherlands, Spain, and Finland, respectively) ^[65]. Additional investigations of schools in the Netherlands, Spain, and Finland revealed a high prevalence of microbial secondary metabolites in damp schools ^[69] and reported respiratory health symptoms among school children ^[70]^[71]. Table 1 shows a summary of some school study results conducted on moisture and mold in school buildings.

Table 1. Summary of results from school studies conducted on moisture and mold.

Reference	Summary of Result
^[67]	Classrooms with recent water leakage are damp. There was a linear association between dampness and culturable bacteria, with 63% of the classrooms examined having dampness and mold.
^[68]	Moisture damage was found in 49% of sampled Danish schools.
^[66]	Moisture damage in schools is associated with microbial growth. Schools with timber-frame construction were majorly in need of moisture and mold damage repair.
^[72]	Inadequate school maintenance can result in moisture damage of the school structure.
^[73]	Effective ventilation and cleaning guard against moisture and mold growth risk.

5. Cleanliness in Schools

Cleaning and hygiene involve the removal of unwanted substances from the school environment. These unwanted substances may include noticeable dirt on surfaces, such as students’ desks, and disinfecting high-contact objects, such as toilet seats and doors, which may be contaminated with pathogenic microorganisms. It also includes hand washing practices and other forms of sanitation among students and school staff, such as proper waste disposal in schools, eating in the cafeteria, and the use of functioning toilets. Classrooms are usually more crowded than other occupied spaces (such as offices); hence, students meet one another more often. Therefore, it is important that their school environment is clean and that hygiene is enhanced to avoid the start and exacerbation of diseases or their spread. Table 2 shows a summary of some school study results on cleanliness in schools.

Table 2. Summary of results from school studies conducted on cleanliness.

Reference	Summary of Result
^[74]	A total of 10% of schools studied in rural India had drinking water problems, while 40% and 50% had waste disposal problems and toilet problems, respectively.
^[75]	In a study in Bangladesh, 18 to 95 students shared one toilet, 36% of the schools studied had proper sanitation, and 47% had handwashing points.
^[76]	There was lack of water and proper cleaning. Inadequate toilet systems made students prefer open defecation.
^[77]^[78]	Ineffective classroom cleaning was related to absenteeism.
^[79]	Improper cleaning of high-contact surfaces in schools was related to students’ weekly absences from school due to gastrointestinal illness.
^[80]^[81]	Improved sanitation was associated with a reduction in disease transmission.

6. Effects of IEQ (Thermal Environment and Indoor Air Quality) on Students’ Health Outcomes

IEQ in schools has been identified as a major influencing factor on students’ health outcomes. Apart from their homes, students spend quality time in their classrooms, where they are exposed to their school environment, which studies have shown to be related to their health. This, in part, is due to their inability to fully understand their environment and what might affect it (such as students not knowing the importance of desk cleaning). They are not able to effectively influence decisions concerning their school environment, they have developing organ systems (digestive, respiratory, nervous, and reproductive), breathe more air per body size ratio in comparison to adults, and have a weak immunity that is sensitive to pathogens and other pollutants ^[82]^[83]. Therefore, it is important to pay attention to the factors that affect students’ health. Table 3 shows a summary of some school studies conducted on IEQ and students’ health.

Table 3. Summary of school studies conducted on IEQ and students’ health outcomes.

Reference	Study Population	IEQ Parameters Studied	Health Outcomes/Effect
^[84]	108 schools (401 classrooms) with 6590 pupils in France.	Formaldehyde, PM_2.5, Aldehyde acrolein, Nitrogen dioxide (NO₂).	Rhino-conjunctivitis was associated with high concentration of formaldehyde (OR 1.19; 95% CI 1.04 to 1.36). The prevalence of asthma was associated with high concentration of PM_2.5 (OR 1.21; 95% CI 1.05 to 1.39), aldehyde (OR 1.22; 95% CI 1.09 to 1.38), and NO₂ (OR 1.16; 95% CI 0.95 to 1.41).
^[85]	8 schools (23 classrooms) with 1014 pupils in Sweden.	Microbial volatile organic compounds (MVOCs), plasticizers.	Wheezing, daytime breathlessness, nocturnal breathlessness, and asthma associated with MVOCs (e.g., Isobutanol) OR 2.74 (0.71–10.57), 2.05 (0.30–13.87), 7.23 (0.60–87.16) and 1.43 (0.35–5.87), respectively.
^[86]	10 schools (30 classrooms) with 1414 students in China.	Mold, temperature, CO₂, NO₂, O₃, CH₂O	Asthma attacks associated with mold (OR 2.40: p < 0.05). Daytime breathlessness associated with temperature (OR 1.26: p < 0.001). Current asthma associated with CO₂ (OR 1.18 for 100 ppm: p < 0.01) and NO₂ (OR 1.51 for 10 µg/m³: p < 0.01)
^[87]	28 schools (162 classrooms) with 45,000 students in U.S.	Ventilation rate	Students’ illness absences increases with a reduced ventilation rate/student that is below California standard (7.1 L/s-person).
^[88]	51 schools (81 classrooms) with 1019 students in Portugal.	IEQ (T, RH, CO, CO₂, O₃, etc.)	A total of 2.2% of students had chronic bronchitis (p > 0.05), 15.2% had wheezing (p > 0.05), 26.1% had sneezing attacks (p > 0.05), 18.9% had rhinitis (p > 0.05), 16.1% had coughs (p > 0.05), and 10.1% had breathing difficulties (p > 0.05).
^[89]	8 schools (8 classrooms) with 252 students	Temperature	97%, 97%, and 94% of students were tired, lost concentration, and were sleepy due to thermal discomfort.
^[79]	34 schools with 15,814 students	ATP as a measure of high contact surface contamination	ATP levels increased the probability of students being absent from school due to gastrointestinal illness (parameter estimate 0.91 (0.84–1.00) p = 0.04).

Students’ health is affected by the many contaminants that can exist in their classrooms ^[90]^[91]. These contaminants may be physical, chemical, or biological in nature, such as particulate matter (PM), VOCs, and mold, respectively ^[77]^[92]^[93]^[94]. These can be generated indoors: for example, mold growth is associated with moisture damage ^[68]^[95] and VOCs with emissions from building materials ^[96]^[97]^[98]. They can also originate from outdoor sources when schools are built near pollution sources, such as incinerators and power plants. For example, Brazilian schools that were closed to potential sources of pollutants such as vehicular traffic and petrochemical plants had high concentrations of pollutants such as PM and VOCs ^[99]. Exposure to these agents may cause or exacerbate pre-existing health conditions, as presented in the following.

A multi-country school exposure study by Adams et al. ^[100] linked both bacteria and mold in classrooms to moisture-damaged schools that resulted in health effects for students. Students who were exposed to microbial contamination (bacterial and fungi) in their classrooms due to moisture damage experienced respiratory symptoms that affected their health outcomes. The study by Mi et al. ^[86] found an association between indoor mold in classrooms and asthmatic attacks (OR 2.40: p < 0.05). This further validates the effect microbial contamination can have on the health and wellbeing of students. In addition to biological contaminants, high concentrations of chemical pollutants in the classroom, often exceeding recommended levels, can also impact students’ health outcomes. A study of French primary schools reported an increased prevalence of rhinitis and asthma in pupils due to a high concentration of VOCs (OR 1.19; 95% CI 1.04 to 1.36) and of PM_2.5 (OR 1.21; 95% CI 1.05 to 1.39), respectively, in classrooms ^[84]. An investigation by Kim et al. ^[85] found that a higher concentration of microbial volatile organic compounds (MVOCs) resulted in pupils experiencing nocturnal breathlessness, daytime breathlessness, wheezing, and doctor-diagnosed asthma.

Inadequate ventilation (indicated by high classroom CO₂) has been associated with children experiencing asthmatic attacks, cough, and rhinitis, as well as increased illness absenteeism ^[77]^[87], reduced students’ cognitive performance ^[101], and reduced levels of concentration ^[88]. Mi et al. ^[86] found classroom indoor CO₂ to be related to current asthma (OR 1.26: p < 0.001). Daisey et al. ^[92] also reported that inadequate ventilation in classrooms led to adverse health symptoms in their study. A study by Cartieaux et al. ^[102] found that IEQ adversely affected students’ health, resulting in respiratory symptoms and other respiratory diseases. This was supported by the study of Sundell et al. ^[103], which showed that inadequate ventilation reduced respiratory functions and resulted in asthmatic symptoms. While CO₂ itself is not considered a pollutant, it is used as a proxy for ventilation adequacy. A high concentration of indoor CO₂ serves as an indicator of low oxygen (O₂) levels in the indoor space, which is related to ineffective air exchange.

7. Effect of IEQ (Thermal Environment and Indoor Air Quality) on Learning Outcomes

Studies have shown the negative impact of being absent from classes on student learning achievement. An absent student misses out on the complete lesson experience, unlike their peers. This absence could potentially impact their understanding of the subject. In a study by Gottfried ^[104], absent school days by pupils were found to affect their learning achievement, lowering their mathematical and reading achievement results. Missed school days affected the grades of student negatively in a study by Hidayat et al. ^[105]. Moonie et al. ^[106] recorded a similar result, finding a negative relationship between absenteeism and student performance. A meta-analysis performed by Credé et al. ^[107] found class attendance to have a serious impact on student grades. The impact of IEQ on students’ absenteeism or on their health, which leads to missed school days, can be said to have an indirect impact on their learning outcomes. For example, an increase in classroom CO₂ concentration levels was related to reduced ventilation and associated with up to one half-day increase in student absence from school ^[108]. While missed school days were negatively associated with students’ academic outcomes in a study by Young et al. ^[109], the association between a lower student grade and IEQ parameters analyzed in the study was not moderated by students’ missed school days.

Exposure to PM was associated with about a 2% increase in absence rates per academic year ^[110]. As explained by Gaihre et al. ^[108] and Mendell et al. ^[87], IEQ may not only affect students’ academic performance but can also result in parents missing work to stay with their kids at home, ultimately having economic consequences.

References

Çelik, A.; Özkan, F. Premorbid Adjustment Effect on Academic Performance: A Review. Sage Sci. Rev. Educ. Technol. 2003, 6, 1–11.
Zhang, R.; Tan, Y.; Wang, Y.; Wang, H.; Zhang, M.; Liu, J.; Xiong, J. Predicting the concentrations of VOCs in a controlled chamber and an occupied classroom via a deep learning approach. Build. Environ. 2022, 207, 108525.
Wargocki, P.; Wyon, D.P.; Sundell, J.; Clausen, G.; Fanger, P.O. The effects of outdoor air supply rate in an office on perceived air quality, sick building syndrome (SBS) symptoms and productivity. Indoor Air 2000, 10, 222–236.
MacNaughton, P.; Pegues, J.; Satish, U.; Santanam, S.; Spengler, J.; Allen, J. Economic, Environmental and Health Implications of Enhanced Ventilation in Office Buildings. Int. J. Environ. Res. Public Health 2015, 12, 14709–14722.
Sharpe, T.; Farren, P.; Howieson, S.; Tuohy, P.; McQuillan, J. Occupant Interactions and Effectiveness of Natural Ventilation Strategies in Contemporary New Housing in Scotland, UK. Int. J. Environ. Res. Public Health 2015, 12, 8480–8497.
Rim, D.; Schiavon, S.; Nazaroff, W.W. Energy and Cost Associated with Ventilating Office Buildings in a Tropical Climate. PLoS ONE 2015, 10, e0122310.
Patton, A.P.; Calderon, L.; Xiong, Y.; Wang, Z.; Senick, J.; Allacci, M.S.; Plotnik, D.; Wener, R.; Andrews, C.J.; Krogmann, U.; et al. Airborne Particulate Matter in Two Multi-Family Green Buildings: Concentrations and Effect of Ventilation and Occupant Behavior. Int. J. Environ. Res. Public Health 2016, 13, 144.
Aflaki, A.; Mahyuddin, N.; Mahmoud, Z.A.; Baharum, M.R. A review of natural ventilation applications through building façade components and ventilation openings in tropical climates. Energy Build. 2015, 101, 153–162.
Walker, A. Natural Ventilation, Whole Building Design Guide (WBDG), a Program of the National Institute of Building Sciences; National Renewable Energy Laboratory: Golden, CO, USA, 2016.
Bamdad, K.; Matour, S.; Izadyar, N.; Omrani, S. Impact of climate change on energy saving potentials of natural ventilation and ceiling fans in mixed-mode buildings. Build. Environ. 2022, 209, 108662.
Tong, Z.; Chen, Y.; Malkawi, A. Estimating natural ventilation potential for high-rise buildings considering boundary layer meteorology. Appl. Energy 2017, 193, 276–286.
Tong, Z.; Chen, Y.; Malkawi, A.; Liu, Z.; Freeman, R.B. Energy saving potential of natural ventilation in China: The impact of ambient air pollution. Appl. Energy 2016, 179, 660–668.
Zhai, Z.J.; El Mankibi, M.; Zoubir, A. Review of natural ventilation models. Energy Procedia 2015, 78, 2700–2705.
Chu, C.R.; Chiu, Y.H.; Tsai, Y.T.; Wu, S.L. Wind-driven natural ventilation for buildings with two openings on the same external wall. Energy Build. 2015, 108, 365–372.
Haase, M.; Amato, A. An investigation of the potential for natural ventilation and building orientation to achieve thermal comfort in warm and humid climates. Sol. Energy 2009, 83, 389–399.
Jamaludin, N.; Mohammed, N.I.; Khamidi, M.F.; Wahab, S.N.A. Thermal comfort of residential building in Malaysia at different micro-climates. Procedia Soc. Behav. Sci. 2015, 170, 613–623.
Fuoco, F.C.; Stabile, L.; Buonanno, G.; Trassiera, C.; Massimo, A.; Russi, A.; Mazaheri, M.; Morawska, L.; Andrade, A. Indoor Air Quality in Naturally Ventilated Italian Classrooms. Atmosphere 2015, 6, 1652–1675.
Toyinbo, O.; Phipatanakul, W.; Shaughnessy, R.; Haverinen-Shaughnessy, U. Building and indoor environmental quality assessment of Nigerian primary schools: A pilot study. Indoor Air 2019, 29, 510–520.
Awbi, H.B. Ventilation Systems: Design and Performance; Routledge: Oxfordshire, UK, 2007.
Reshetniak, E. Mechanical Supply and Exhaust Ventilation in Residential Building. Bachelor’s Thesis, Mikkeli University of Applied Sciences, Mikkeli, Finland, 2014.
Ianniello, E. Ventilation Systems and IAQ in School Buildings. Rehva J. 2011, 26–29. Available online: https://www.rehva.eu/fileadmin/hvac-dictio/02-2011/Ventilation_systems_and_IAQ_in_school_buildings.pdf (accessed on 1 August 2023).
van der Zee, S.C.; Strak, M.; Dijkema, M.B.; Brunekreef, B.; Janssen, N.A. The impact of particle filtration on indoor air quality in a classroom near a highway. Indoor Air 2017, 27, 291–302.
Brittle, J.P.; Eftekhari, M.; Firth, S.K. Mechanical ventilation & cooling energy versus thermal comfort: A study of mixed mode office building performance in Abu Dhabi. In Proceedings of the 9th Windsor Conference: Making Comfort Relevant, Windsor, UK, 7–10 April 2016.
Ji, Y.; Lomas, K.J.; Cook, M.J. Hybrid ventilation for low energy building design in south China. Build. Environ. 2009, 44, 2245–2255.
Seppänen, O. Ventilation, energy and indoor air quality. In Proceedings of the 2016, 9th International Conference on Indoor Air Quality and Climate, Monterey, CA, USA, 1–5 July 2002.
Joshi, S.M. The sick building syndrome. Indian J. Occup. Environ. Med. 2008, 12, 61–64.
Wallner, P.; Munoz, U.; Tappler, P.; Wanka, A.; Kundi, M.; Shelton, J.F.; Hutter, H.P. Indoor Environmental Quality in Mechanically Ventilated, Energy-Efficient Buildings vs. Conventional Buildings. Int. J. Environ. Res. Public Health 2015, 12, 14132–14147.
Yang, W.H.; Sohn, J.; Kim, J.W.; Son, B.; Park, J. Indoor air quality investigation according to age of the school buildings in Korea. J. Environ. Manag. 2009, 90, 348–354.
Toftum, J.; Kjeldsen, B.U.; Wargocki, P.; Menå, H.R.; Hansen, E.M.N.; Clausen, G. Association between classroom ventilation mode and learning outcome in Danish schools. Build. Environ. 2015, 92, 494–503.
Toyinbo, O.; Shaughnessy, R.; Turunen, M.; Putus, T.; Metsämuuronen, J.; Kurnitski, J.; Haverinen-Shaughnessy, U. Building characteristics, indoor environmental quality, and mathematics achievement in Finnish elementary schools. Build. Environ. 2016, 104, 114–121.
Rosbach, J.T.M.; Vonk, M.; Duijm, F.; van Ginkel, J.T.; Gehring, U.; Brunekreef, B. A ventilation intervention study in classrooms to improve indoor air quality: The FRESH study. Environ. Health 2013, 12, 110.
Batterman, S. Review and Extension of CO2-Based Methods to Determine Ventilation Rates with Application to School Classrooms. Int. J. Environ. Res. Public Health 2017, 14, 145.
Zapata-Lancaster, M.G.; Ionas, M.; Toyinbo, O.; Smith, T.A. Carbon dioxide concentration levels and thermal comfort in primary school classrooms: What pupils and teachers do. Sustainability 2023, 15, 4803.
Scheff, P.A.; Paulius, V.K.; Huang, S.W.; Conroy, L.M. Indoor air quality in a middle school, Part I: Use of CO2 as a tracer for effective ventilation. Appl. Occup. Environ. Hyg. 2000, 15, 824–834.
Smith, P.N. Determination of ventilation rates in occupied buildings from metabolic CO2 concentrations and production rates. Build. Environ. 1988, 23, 95–102.
Shen, G.; Ainiwaer, S.; Zhu, Y.; Zheng, S.; Hou, W.; Shen, H.; Chen, Y.; Wang, X.; Cheng, H.; Tao, S. Quantifying source contributions for indoor CO2 and gas pollutants based on the highly resolved sensor data. Environ. Pollut. 2020, 267, 115493.
Zhang, T.T.; Yin, S.; Wang, S. Quantify impacted scope of human expired air under different head postures and varying exhalation rates. Build. Environ. 2011, 46, 1928–1936.
World Health Organization. Methods for Monitoring Indoor Air Quality in Schools: Report of a Meeting, Bonn, Germany, 4–5 April 2011; World Health Organization: Geneva, Switzerland, 2011.
Hänninen, O. Combining CO2 Data from Ventilation Phases Improves Estimation of Air Exchange Rates. In Proceedings of the 10th International Conference on Healthy Buildings, Brisbane, Australia, 8–12 July 2012.
ASHRAE Standard 62-1992; Ventilation for Acceptable Indoor Air Quality. American Society of Heating Refrigerating, and Air Conditioning Engineers (ASHRAE): Atlanta, GA, USA, 1992.
ANSI/ASHRAE Standard 62.1-2016; Ventilation for Acceptable Indoor Air Quality. Approved American National Standard (ANSI)/American Society of Heating Refrigerating, and Air Conditioning Engineers (ASHRAE): Atlanta, GA, USA, 2016.
National Building Code of Finland (G1) Ministry of Environment. Housing Design Regulations and Guidelines 2005: Adopted in Helsinki on the 1st of October 2004; Ministry of Environment: Helsinki, Finland, 2004.
Ministry of Social Affairs and Health. Decree of the Ministry of Social Affairs and Health on Health-related Conditions of Housing and Other Residential Buildings and Qualification Requirements for Third-party Experts; 2015, 545/2015; Ministry of Social Affairs and Health: Helsinki, Finland, 2015.
National Environment Agency. Indoor Air Quality Parameters and Measurement. 2016. Available online: http://www.enviresearch.co.th/wp-content/uploads/2020/01/Indoor-Air-2016.pdf (accessed on 11 July 2023).
Toyinbo, O.; Hägerhed, L.; Dimitroulopoulou, S.; Dudzinska, M.; Emmerich, S.; Hemming, D.; Park, J.H.; Haverinen-Shaughnessy, U.; Committee, S.T. Open database for international and national indoor environmental quality guidelines. Indoor Air 2022, 32, e13028.
Dimitroulopoulou, S.; Dudzińska, M.R.; Gunnarsen, L.; Hägerhed, L.; Maula, H.; Singh, R.; Toyinbo, O.; Haverinen-Shaughnessy, U. Indoor Air Quality Guidelines from Across the World: An Appraisal Considering Energy Saving, Health, Productivity, and Comfort. Environ. Int. 2023, 178, 108127.
National Building Code of Nigeria. 2006. Available online: https://docplayer.net/31726834-National-building-code.html (accessed on 22 May 2023).
Lu, S.; Fang, K.; Qi, Y.; Wei, S. Influence of Natural Ventilation on Thermal Comfort in Semi-open Building under Early Summer Climate in the Area of Tropical Island. Procedia Eng. 2015, 121, 944–951.
ASHRAE Standard 55-2010; Thermal Environmental Conditions for Human Occupancy. American Society of Heating Refrigerating, and Air Conditioning Engineers (ASHRAE): Atlanta, GA, USA, 2016. Available online: https://www.ashrae.org/File%20Library/Technical%20Resources/Standards%20and%20Guidelines/Standards%20Addenda/55_2010_a.pdf (accessed on 5 May 2023).
Fanger, P.O. Thermal Comfort. Analysis and Applications in Environmental Engineering; Danish Technical Press: Copenhagen, Denmark, 1970.
Daghigh, R. Assessing the thermal comfort and ventilation in Malaysia and the surrounding regions. Renew Sustain. Energy Rev. 2015, 48, 681–691.
Quang, T.N.; He, C.; Knibbs, L.D.; de Dear, R.; Morawska, L. Co-optimisation of indoor environmental quality and energy consumption within urban office buildings. Energy Build. 2014, 85, 225–234.
Al horr, Y.; Arif, M.; Katalygiotou, M.; Mazroei, A.; Kaushi, A.; Elsarrag, E. Impact of indoor environmental quality on occupant well-being and comfort: A review of the literature. Int. J. Sust. Built. Environ. 2016, 5, 1–11.
Teli, D.; James, P.A.B.; Jentsch, M.F. Thermal comfort in naturally ventilated primary school classrooms. Build. Res. Inf. 2013, 41, 301–316.
Zomorodian, Z.S.; Tahsildoost, M.; Hafezi, M. Thermal comfort in educational buildings: A review article. Renew. Sustain. Energy Rev. 2016, 59, 895–906.
Sekhar, S.C. Thermal comfort in air-conditioned buildings in hot and humid climates—Why are we not getting it right? Indoor Air 2016, 26, 138–152.
Damiati, S.A.; Zaki, S.A.; Rijal, H.B.; Wonorahardjo, S. Field study on adaptive thermal comfort in office buildings in Malaysia, Indonesia, Singapore, and Japan during hot and humid season. Build. Environ. 2016, 109, 208–223.
Yang, W.; Zhang, G. Thermal comfort in naturally ventilated and air-conditioned buildings in humid subtropical climate zone in China. Int. J. Biometeorol. 2007, 52, 385–398.
Indraganti, M. Adaptive use of natural ventilation for thermal comfort in Indian apartments. Build. Environ. 2010, 45, 1490–1507.
Prajongsan, P.; Sharples, S. Enhancing natural ventilation, thermal comfort and energy savings in high-rise residential buildings in Bangkok through the use of ventilation shafts. Build. Environ. 2012, 50, 104–113.
Daghigh, R.; Adam, N.M.; Sahari, B.B. Ventilation Parameters and Thermal Comfort of Naturally and Mechanically Ventilated Offices. Indoor Built Environ. 2009, 18, 113–122.
Leachman, M.; Albares, N.; Masterson, K.; Wallace, M. Most states have cut school funding, and some continue cutting. Cent. Budg. Policy Priorities 2016, 4, 1–16.
Leachman, M.; Masterson, K.; Figueroa, E. A punishing decade for school funding. Cent. Budg. Policy Priorities 2017, 29, 1–17.
Lappalainen, S.; Kähkönen, E.; Loikkanen, P.; Palomäki, E.; Lindroos, O.; Reijula, K. Evaluation of priorities for repairing in moisture-damaged school buildings in Finland. Build. Environ. 2001, 36, 981–986.
Haverinen-Shaughnessy, U.; Borras-Santos, A.; Turunen, M.; Zock, J.P.; Jacobs, J.; Krop, E.J.; Casas, L.; Shaughnessy, R.; Täubel, M.; Heederik, D.; et al. Occurrence of moisture problems in schools in three countries from different climatic regions of Europe based on questionnaires and building inspections—The HITEA study. Indoor Air 2012, 22, 457–466.
Annila, P.J.; Lahdensivu, J.; Suonketo, J.; Pentti, M.; Vinha, J. Need to repair moisture-and mould damage in different structures in finnish public buildings. J. Build. Eng. 2018, 16, 72–78.
Cho, S.J.; Cox-Ganser, J.M.; Park, J.-H. Observational scores of dampness and mold associated with measurements of microbial agents and moisture in three public schools. Indoor Air 2016, 26, 168–178.
Clausen, G.; Host, A.; Toftum, J.; Bekö, G.; Weschler, C.; Callesen, M.; Buhl, S.; Ladegaard, M.B.; Langer, S.; Andersen, B.; et al. Children’s health and its association with indoor environments in Danish homes and daycare centres—methods. Indoor Air 2012, 22, 467–475.
Peitzsch, M.; Sulyok, M.; Täubel, M.; Vishwanath, V.; Krop, E.; Borràs-Santos, A.; Hyvärinen, A.; Nevalainen, A.; Krska, R.; Larsson, L. Microbial secondary metabolites in school buildings inspected for moisture damage in Finland, The Netherlands and Spain. J. Environ. Monit. 2012, 14, 2044–2053.
Borràs-Santos, A.; Jacobs, J.H.; Täubel, M.; Haverinen-Shaughnessy, U.; Krop, E.J.; Huttunen, K.; Hirvonen, M.R.; Pekkanen, J.; Heederik, D.J.; Zock, J.P.; et al. Dampness and mould in schools and respiratory symptoms in children: The HITEA study. Occup. Environ. Med. 2013, 70, 681–687.
Jacobs, J.; Borràs-Santos, A.; Krop, E.; Täubel, M.; Leppänen, H.; Haverinen-Shaughnessy, U.; Pekkanen, J.; Hyvärinen, A.; Doekes, G.; Zock, J.-P.; et al. Dampness, bacterial and fungal components in dust in primary schools and respiratory health in schoolchildren across Europe. Occup. Environ. Med. 2014, 71, 704–712.
Annila, P.J.; Hellemaa, M.; Pakkala, T.A.; Lahdensivu, J.; Suonketo, J.; Pentti, M. Extent of moisture and mould damage in structures of public buildings. Case Stud. Constr. Mater. 2017, 6, 103–108.
Uotila, U.; Saari, A. Determining ventilation strategies to relieve health symptoms among school occupants. Facilities 2023, 41, 1–20.
Majra, J.P.; Gur, A. School Environment and Sanitation in Rural India. J. Glob. Infect. Dis. 2010, 2, 109–111.
Chatterley, C.; Javernick-Will, A.; Linden, K.G.; Alam, K.; Bottinelli, L.; Venkatesh, M. A qualitative comparative analysis of well-managed school sanitation in Bangladesh. BMC Public Health 2014, 14, 6.
Xuan, L.T.; Hoat, L.N.; Rheinländer, T.; Dalsgaard, A.; Konradsen, F. Sanitation behavior among schoolchildren in a multi-ethnic area of Northern rural Vietnam. BMC Public Health 2012, 12, 1–11.
Annesi-Maesano, I.; Baiz, N.; Banerjee, S.; Rudnai, P.; Rive, S.; SINPHONIE Group. Indoor air quality and sources in schools and related health effects. J. Toxicol. Environ. Health B Crit. Rev. 2013, 16, 491–550.
Wang, Z.; Lapinski, M.; Quilliam, E.; Jaykus, L.A.; Fraser, A. The effect of hand-hygiene interventions on infectious disease-associated absenteeism in elementary schools: A systematic literature review. Am. J. Infect. Control 2017, 45, 682–689.
Shaughnessy, R.; Hernandez, M.; Haverinen-Shaughnessy, U. Effects of classroom cleaning on student health: A longitudinal study. J. Expo. Sci. Environ. Epidemiol. 2022, 32, 767–773.
World Health Organization. Progress on Drinking Water, Sanitation and Hygiene in Schools: Special Focus on COVID-19; Unicef: New York, NY, USA, 2020.
Purnama, S.G.; Susanna, D. Hygiene and sanitation challenge for COVID-19 prevention in Indonesia. Kesmas J. Kesehat. Masy. Nas. Natl. Public Health J. 2020, 15, 6–13.
Buka, I.; Koranteng, S.; Osornio-Vargas, A.R. The effects of air pollution on the health of children. Paediatr. Child. Health 2006, 11, 513–516.
Brockmeyer, S.; D’Angiulli, A. How air pollution alters brain development: The role of neuroinflammation. Transl. Neurosci. 2016, 7, 24–30.
Annesi-Maesano, I.; Hulin, M.; Lavaud, F.; Raherison, C.; Kopferschmitt, C.; de Blay, F.; Charpin, D.A.; Denis, C. Poor air quality in classrooms related to asthma and rhinitis in primary schoolchildren of the French 6 Cities Study. Thorax 2012, 67, 682–688.
Kim, J.L.; Elfman, L.; Mi, Y.; Wieslander, G.; Smedje, G.; Norbäck, D. Indoor molds, bacteria, microbial volatile organic compounds and plasticizers in schools—associations with asthma and respiratory symptoms in pupils. Indoor Air 2007, 17, 153–163.
Mi, Y.H.; Norback, D.; Tao, J.; Mi, Y.L.; Ferm, M. Current asthma and respiratory symptoms among pupils in Shanghai, China: Influence of building ventilation, nitrogen dioxide, ozone, and formaldehyde in classrooms. Indoor Air 2006, 16, 454–464.
Mendell, M.J.; Eliseeva, E.A.; Davies, M.M.; Spears, M.; Lobscheid, A.; Fisk, W.J.; Apte, M.G. Association of classroom ventilation with reduced illness absence: A prospective study in C alifornia elementary schools. Indoor Air 2013, 23, 515–528.
Ferreira, A.M.; Cardoso, M. Indoor air quality and health in schools. J. Bras. Pneumol. 2014, 40, 259–268.
Bidassey-Manilal, S.; Wright, C.Y.; Engelbrecht, J.C.; Albers, P.N.; Garland, R.M.; Matooane, M. Students’ Perceived Heat-Health Symptoms Increased with Warmer Classroom Temperatures. Int. J. Environ. Res. Public Health 2016, 13, 566.
Madureira, J.; Paciência, I.; Ramos, E.; Barros, H.; Pereira, C.; Teixeira, J.P.; Fernandes, E.O. Children’s Health and Indoor Air Quality in Primary Schools and Homes in Portugal-Study Design. J. Toxicol. Environ. Health A 2015, 78, 915–930.
Sadrizadeh, S.; Yao, R.; Yuan, F.; Awbi, H.; Bahnfleth, W.; Bi, Y.; Cao, G.; Croitoru, C.; de Dear, R.; Haghighat, F. Indoor Air quality and health in schools: A critical review for developing the roadmap for the future school environment. J. Build. Eng. 2022, 57, 104908.
Daisey, J.M.; Angell, W.J.; Apte, M.G. Indoor air quality, ventilation and health symptoms in schools: An analysis of existing information. Indoor Air 2003, 13, 53–64.
Yousaf, A.R.; Khan, N. The Study of Particulate Matter Concentration in Schools of Lahore. Nat. Environ. Poll. Tech. 2013, 12, 289–296.
Zhong, L.; Su, F.C.; Batterman, S. Volatile Organic Compounds (VOCs) in Conventional and High Performance School Buildings in the U.S. Int. J. Environ. Res. Public Health 2017, 14, 100.
Vilén, L.; Päivinen, M.; Atosuo, J.; Putus, T. Transferring from moisture damaged school building to clean facilities–The avoidance of mold exposure induces a decline in symptoms and improvement in lung function among personnel. Environ. Res. 2022, 212, 113598.
Zhang, Y.P.; Xu, Y. Characteristics and correlations of VOC emissions from building materials. Int. J. Heat Mass Transf. 2003, 46, 4877–4883.
Kim, S.S.; Kang, D.H.; Choi, D.H.; Yeo, M.S.; Kim, K.W. VOC Emission from Building Materials in Residential Buildings with Radiant Floor Heating Systems. Aerosol Air Qual. Res. 2012, 12, 1398–1408.
Huang, S.; Xiong, J.; Zhang, Y. A rapid and accurate method, ventilated chamber C-history method, of measuring the emission characteristic parameters of formaldehyde/VOCs in building materials. J. Hazard Mater. 2013, 261, 542–549.
Godoi, R.H.; Godoi, A.F.; Gonçalves Junior, S.J.; Paralovo, S.L.; Borillo, G.C.; Barbosa, C.G.G.; Arantes, M.G.; Charello, R.C.; Filho, N.A.R.; Grassi, M.T.; et al. Healthy environment--indoor air quality of Brazilian elementary schools nearby petrochemical industry. Sci. Total Environ. 2013, 463–464, 639–646.
Adams, R.I.; Leppänen, H.; Karvonen, A.M.; Jacobs, J.; Borràs-Santos, A.; Valkonen, M.; Krop, E.; Haverinen-Shaughnessy, U.; Huttunen, K.; Zock, J.P.; et al. Microbial exposures in moisture-damaged schools and associations with respiratory symptoms in students: A multi-country environmental exposure study. Indoor Air 2021, 31, 1952–1966.
Hutter, H.P.; Haluza, D.; Piegler, K.; Hohenblum, P.; Fröhlich, M.; Scharf, S.; Uhl, M.; Damberger, B.; Tappler, P.; Kundi, M.; et al. Semivolatile compounds in schools and their influence on cognitive performance of children. Int. J. Occup. Med. Environ. Health 2013, 26, 628–635.
Cartieaux, E.; Rzepka, M.A.; Cuny, D. Indoor air quality in schools. Arch. Pediatr. 2011, 18, 789–796.
Sundell, J.; Levin, H.; Nazaroff, W.W.; Cain, W.S.; Fisk, W.J.; Grimsrud, D.T.; Gyntelberg, F.; Li, Y.; Persily, A.K.; Pickering, A.C.; et al. Ventilation rates and health: Multidisciplinary review of the scientific literature (Commemorating 20 Years of Indoor Air). Indoor Air 2011, 21, 191–204.
Gottfried, M.A. Chronic Absenteeism and Its Effects on Students’ Academic and Socioemotional Outcomes. JESPAR 2014, 19, 53–75.
Hidayat, L.; Vansal, S.; Kim, E.; Sullivan, M.; Salbu, R. Pharmacy Student Absenteeism and Academic Performance. Am. J. Pharm. Educ. 2012, 76, 8.
Moonie, S.; Sterling, D.A.; Figgs, L.W.; Castro, M. The relationship between school absence, academic performance, and asthma status. J. Sch. Health 2008, 78, 140–148.
Crede, M.; Roch, S.G.; Kieszczynka, U.M. Class attendance in college: A meta-analytic review of the relationship of class attendance with grades and student characteristics. Rev. Educ. Res. 2010, 80, 272–295.
Gaihre, S.; Semple, S.; Miller, J.; Fielding, S.; Turner, S. Classroom carbon dioxide concentration, school attendance, and educational attainment. J. Sch. Health 2014, 84, 569–574.
Young, B.N.; Benka-Coker, W.O.; Weller, Z.D.; Oliver, S.; Schaeffer, J.W.; Magzamen, S. How does absenteeism impact the link between school’s indoor environmental quality and student performance? Build. Environ. 2021, 203, 108053.
MacNaughton, P.; Eitland, E.; Kloog, I.; Schwartz, J.; Allen, J. Impact of particulate matter exposure and surrounding “greenness” on chronic absenteeism in Massachusetts public schools. Int. J. Environ. Res. Public Health 2017, 14, 207.

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