Associations of indoor carbon dioxide concentrations, air temperature, and humidity with perceived air quality and sick building syndrome symptoms in Chinese homes

Indoor Air ◽  
2021 ◽  
Author(s):  
Jing Hou ◽  
Yuexia Sun ◽  
Xilei Dai ◽  
Junjie Liu ◽  
Xiong Shen ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Air Quality ◽  
Air Temperature ◽  
Sick Building Syndrome ◽  
Carbon Dioxide Concentrations ◽  
Temperature And Humidity ◽  
Sick Building

scholarly journals Correlation amongst Indoor Air Quality, Ventilation and Carbon Dioxide

2017 ◽  
Vol 9 (2) ◽  
pp. 179-192 ◽  
Author(s):  
N. L. Sireesha
Keyword(s):  
Carbon Dioxide ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Sick Building Syndrome ◽  
Well Being ◽  
Ventilation Rate ◽  
Indoor Contaminants ◽  
Sick Building ◽  
Carbon Dioxide Co2

The calculation of carbon dioxide (CO2)  intensities can be employed to see the quality of indoor air and ventilation. The studies undertaken till date have been distorted. The current study summaries the association amongst carbon dioxide and building air quality and ventilation, with carbon dioxide being the marker to evaluate air quality and ventilation performance. High carbon dioxide intensities may show insufficient ventilation per occupant and high indoor contaminants intensities, resulting in the Sick Building Syndrome (SBI) Symptoms. The researcher assessed the literature related to indoor air quality (IAQ), ventilation, and building-linked health issues in schools linked to CO2 discharges and recognised general indicated building-linked well-being signs found in schools. A high rise in the ventilation rate or enhancement in ventilation efficacy and/or indoor contaminant source regulation would be anticipated to reduce the occurrence of chosen signs to its optimum.

scholarly journals Relation Between Microclimate and Air Quality in the Extensively Reared Turkey House

2017 ◽  
Vol 40 (1) ◽  
pp. 83-90
Author(s):  
Mario Ostović ◽  
Sven Menčik ◽  
Ivica Ravić ◽  
Slavko Žužul ◽  
Željko Pavičić ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Air Quality ◽  
Relative Humidity ◽  
Air Temperature ◽  
Indoor Air ◽  
Animal Health ◽  
Airflow Rate ◽  
Carbon Dioxide Concentrations ◽  
Bacteria And Fungi

Abstract Good air quality in poultry houses is crucial for animal health and productivity. In these houses, air is generally contaminated with noxious gases and microorganisms, the concentrations of which depend on numerous factors including microclimate. In this case study, the relation between microclimate and air concentrations of noxious gases and microorganisms was investigated in extensively reared turkey house. The study was carried out at a family household in Dalmatia hinterland, Croatia, with 50.3±3.1 turkeys kept in the house during the study period. Air temperature, relative humidity, airflow rate, concentrations of ammonia, carbon dioxide, bacteria and fungi in indoor air were measured three times per month from September to December, in the morning, prior to releasing turkeys out for grazing. Air temperature ranged from 9.73 to 26.98 °C, relative humidity from 63.29% to 75.08%, and airflow rate from 0.11 to 0.17 m/s. Lowest ammonia and carbon dioxide concentrations were measured in September (2.17 ppm and 550 ppm, respectively) and highest in December (4.50 ppm and 900 ppm, respectively). Bacterial and fungal counts were lowest in December (2.51×105 CFU/m3 and 3.27×103 CFU/m3 air, respectively) and highest in September (6.85×105 CFU/m3 and 1.06x105 CFU/m3 air, respectively). Air temperature and relative humidity showed negative correlation with concentrations of noxious gases and positive correlation with air microorganisms (P<0.05 all).

scholarly journals Towards Healthy Levels of Carbon Dioxide in Schools of the National Oil Company of Abu Dhabi

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Ali Abu-Rahmah ◽  
Rasheed Ahmad ◽  
Abdelmaoula Haboub ◽  
Yasmin Abu-Rahmah
Keyword(s):  
Carbon Dioxide ◽  
Sick Building Syndrome ◽  
Abu Dhabi ◽  
Average Value ◽  
Carbon Dioxide Concentrations ◽  
Air Quality Assessment ◽  
School Day ◽  
Sick Building ◽  
Air Intake ◽  
Ventilation Rates

In their annual indoor air quality assessment for ADNOC Schools, the Abu Dhabi Education Council has reported hazardous levels (∼3000 ppm) of carbon dioxide in fifteen classrooms. Exposure of 5,090 students attending the school for ∼eight hours (typical school day) to such high levels of carbon dioxide would induce adverse health conditions like headaches, drowsiness, and lack of concentration on the short term and serious diseases like asthma and sick building syndrome on the long term. The Health, Safety, and Environment committee of the school has identified clogged air intake vents and dirty AC filters as the main cause of the high carbon dioxide concentrations reported. The outdoor (ambient) carbon dioxide level is measured and has an eight-hour average value of 419 ppm. After cleaning thoroughly, the indoor levels of carbon dioxide, temperature, and relative humidity were monitored simultaneously in each classroom and have average values of ∼1117 ppm, ∼24°C, and ∼37%, respectively. In addition, the average indoor-to-outdoor ratio of carbon dioxide has been improved from 3000 / 419 ≈ 7.2 before cleaning the AC filters to an average ratio of ( 1,117 / 419 ≈ 2.7 ) after cleaning. Thus, ventilation rates in the classrooms monitored in this project are adequate and the corrective actions taken were effective.

scholarly journals The Incidence of Sick Building Syndrome and Its Causes on Employees at the Governor’s Office of West Sulawesi Province

2021 ◽  
Vol 10 (2) ◽  
pp. 153
Author(s):  
Ridhayani Adiningsih ◽  
Miftah Chairani Hairuddin
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Air Temperature ◽  
Indoor Air ◽  
Human Life ◽  
Skin Irritation ◽  
Sick Building Syndrome ◽  
P Value ◽  
Cross Sectional ◽  
Sick Building

Introduction: Indoor air quality greatly affects human health because almost 90% of human life is indoors. Some symptoms that are often felt by employees in a building with Sick Building Syndrome (SBS) are fatigue; headaches; symptoms of eye, nose and throat irritation; skin irritation; dry cough, increased irritability and difficulty in concentration; nausea; drowsiness; and hypersensitivity to odor. This research aims to determine the relationship of air quality in space to the incidence of Sick Building Syndrome. Methods: This research was an analytic survey research with cross sectional approach. The samples in this study were employees who were in the Building D of the Provincial Governor's Office, West Sulawesi totalling 82 people. This research was carried out by measuring indoor air quality and giving questionnaires to find out the SBS events. Results: The results of room temperature measurements ranged from 26.14 - 41.46°C, humidity measurement was ≥ 60%, light intensity was ≤ 100 lux, the chemical quality of CO in the air was ≤ 29 mg/m3, CO2 levelin the air was ≤ 1000 ppm, and dust level was ≥ 0.15 mg/m3. Besides, there was a significant relationship between air temperature and dust levels on the incidence of Sick Building Syndrome (SBS), with p value of 0.006. Conclusion: It can be concluded that factors that influenced the occurrence of SBS were air temperature and dust concentration in the room.Keywords: indoor air quality, office, sick building syndrome

Beyond Air Quality—Factors That Affect Prevalence Estimates of Sick Building Syndrome

AIHAJ ◽  
1995 ◽  
Vol 56 (11) ◽  
pp. 1141-1146 ◽  
Author(s):  
Mark A. Mikatavage ◽  
Vernon E. Rose ◽  
Ellen Funkhouser ◽  
R. Kent Oestenstad ◽  
Kenneth Dillon ◽  
...  
Keyword(s):  
Air Quality ◽  
Sick Building Syndrome ◽  
Quality Factors ◽  
Prevalence Estimates ◽  
Sick Building

scholarly journals Transient Effects of Different Ventilation Methods on Car Indoor Air Quality

2015 ◽  
Vol 2 (1) ◽  
pp. 70 ◽  
Author(s):  
Feng-Chyi Duh
Keyword(s):  
Carbon Dioxide ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Air Conditioning ◽  
Heat Index ◽  
Transient Effects ◽  
Air Conditioning System ◽  
Carbon Dioxide Concentrations ◽  
Volatile Organic

This study investigated transient effects on the air quality of parked cars and moving cars with and without operating air conditioning. Carbon dioxide, carbon monoxide, volatile organic compounds, and formaldehyde concentrations were measured for comparative analysis. The results showed that simply changing the air conditioning system from internal circulation to external circulation to introduce air from outside reduces carbon dioxide concentrations by more than 50%, volatile organic compound concentrations by more than 77%, and the heat index from 0.1℃/min to less than 0.05 ℃/min. In order to conserve energy and improve car indoor air quality, this study can serve as a reference on healthy car environments.

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