scholarly journals Indoor Air Quality Assessment Based on Human Physiology - Part 3. Applications

10.14311/496 ◽  
2003 ◽  
Vol 43 (6) ◽  
Author(s):  
M. V. Jokl
Keyword(s):  
Human Physiology ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Evaluation System ◽  
Accurate Estimation ◽  
Air Volume ◽  
Air Quality Assessment ◽  
Environmental Component ◽  
Total Environment

The proposed evaluation system allows something quite new: a) the assessment of the effect of each environmental component (constituent) on the total environment level, b) accurate estimation of air volume for various locations, human occupations and sources of harmful gases. Additional benefits are listed at the conclusion of this part.

scholarly journals Indoor Air Quality Assessment Based on Human Physiology - Part 1. New Criteria Proposal

10.14311/492 ◽  
2003 ◽  
Vol 43 (6) ◽  
Author(s):  
M. V. Jokl
Keyword(s):  
Human Physiology ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Human Perception ◽  
Odor Intensity ◽  
Air Quality Assessment ◽  
Volatile Organic ◽  
Carbon Dioxide Co2 ◽  
New Criteria

Human physiology research makes evident that the Weber-Fechner law applies not only to noise perception but also to the perception of other environmental components. Based on this fact, new decibel units for dor component representing indoor air quality in majority locations have been proposed: decicarbdiox dCd (for carbon dioxide CO2) and decitvoc dTv (for total volatile organic compound TVOC). Equations of these new units have been proved by application of a) experimental relationships between odor intensity (representing odor perception by the human body) and odor concentrations of CO2 and TVOC, b) individually  measured CO2 and TVOC levels (concentrations) – from these new decibel units can be calculated and their values compared with decibel units of noise measured in the same locations. The undoubted benefit of using the decibel scale is that it gives much better approximation to human perception of odor intensity compared to the CO2 and TVOC concentration scales.

scholarly journals Indoor Air Quality Assessment Based on Human Physiology - Part 2. Limits

10.14311/494 ◽  
2003 ◽  
Vol 43 (6) ◽  
Author(s):  
M. V. Jokl
Keyword(s):  
Human Physiology ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Short Term ◽  
Power Stations ◽  
Guidance Note ◽  
Air Quality Assessment ◽  
Optimal Value

In order to evaluate indoor air quality in practice it is necessary to establish limits, or more exactly, tolerable ranges for unadapted and adapted persons. The optimal value overwhelmingly corresponds to PD 20 %. A better value of PD 10 % could be prescribed for asthmatics and for persons with increased requirements, i.e. those allergic to the environment and operators in airport control towers and atomic power stations. A worse value PD 30 % could be accepted as an admissible value. These values differ for unadapted and adapted persons (as introduced by BSR/ASHRAE 62-1989 R). The long-term tolerable value is the end of SBS range (for CO2 it is based on USSR space research, for TVOC on Molhave). The short-term tolerable value is the beginning of the toxic range (for CO2 it is taken from British Guidance Note EH 40/90; for TVOC from Molhave).

Indoor air quality assessment at care centre ABC, Malaysia

2018 ◽  
pp. 39-42
Author(s):  
Kamarul Aini Mohd Sari ◽  
Khaleda Farhah Almar Mastaza ◽  
Mohammad Ashraf Abdul Rahman ◽  
Mohd Kamaruzaman Musa ◽  
Mariah Awang ◽  
...  
Keyword(s):  
Air Quality ◽  
Quality Assessment ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Care Centre ◽  
Air Quality Assessment

scholarly journals INDOOR AIR QUALITY ASSESSMENT FOR A MULTISTOREY UNIVERSITY OFFICE BUILDING IN MALAYSIA

2019 ◽  
Vol 14 (4) ◽  
pp. 93-109
Author(s):  
Abd Halid Abdullah ◽  
Yee Yong Lee ◽  
Eeydzah Aminudin ◽  
Yeong Huei Lee
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Work Performance ◽  
Sick Building Syndrome ◽  
Office Building ◽  
Physical Parameters ◽  
Contributing Factors ◽  
Air Quality Assessment ◽  
Sick Building

The indoor air quality (IAQ) in office buildings should be assessed for public health concerns as it relates to work performance and productivity. Therefore, this paper aims to assess the IAQ in a university office building. From this investigation, the level of contaminated indoor air is examined, the significant causes and contributing factors of contaminated indoor air are determined and a recommendation to improve the existing condition has been proposed. The physical parameters measured include air temperature, air velocity, relative humidity, and concentrations of carbon dioxide (CO2), carbon monoxide (CO), sulphur dioxide (SO2), and also air particles. It was found that the number of air particles of 0.5 μm in diameter is about 197,748 particles/m3, while air particles of 5.0 μm in diameter is around 534 particles/m3. The collected data were then compared with a questionnaire and IAQ standards. In conclusion, the indoor air quality within the multi-storey central office building of Universiti Tun Hussein Onn Malaysia (UTHM) is acceptable and suitable for occupation even though there were countable symptoms of Sick Building Syndrome (SBS) among its occupants.

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