Study on Indoor Air Quality of a Small Office in a Tropical Country

2013 ◽  
Vol 393 ◽  
pp. 827-831 ◽  
Author(s):  
Suhana Ab. Majid ◽  
Ahmad Nazri Azmarini ◽  
Shaharin Anwar Sulaiman
Keyword(s):  
Quality Of Life ◽  
Air Quality ◽  
Relative Humidity ◽  
Indoor Air Quality ◽  
Air Temperature ◽  
Indoor Air ◽  
Research Area ◽  
Tropical Country

Recently, the importance of appropriate Indoor Air Quality (IAQ) attracts interests in health research area. The study of IAQ is important in office. Long term period exposure to poor IAQ level, can lead to discomfort and uneasy feeling and thus may affect productivity and quality of life. The objective of this work is to study the IAQ level in a small lecturer office of an educational building in Malaysia. Throughout this research, the IAQ of a selected lecturer office room was studied. The study involved measurements of indoor air temperature, relative humidity, and CO2 level. From the study, it was found that the level of CO2 temperature and humidity were always within the range of recommended by ASHRAE.

scholarly journals Indoor air quality of newly built low-energy preschools – Are chemical emissions reduced in houses with eco-labelled building materials?

2018 ◽  
Vol 28 (4) ◽  
pp. 506-519 ◽  
Author(s):  
Josefin Persson ◽  
Thanh Wang ◽  
Jessika Hagberg
Keyword(s):  
Air Quality ◽  
Relative Humidity ◽  
Indoor Air Quality ◽  
Air Temperature ◽  
Indoor Air ◽  
Building Materials ◽  
Ventilation System ◽  
Sampling Period ◽  
Low Energy ◽  
Low Energy Buildings

The use of an airtight frame in low-energy buildings could increase the risk of health-related problems, such as allergies and sick building syndromes (SBS), associated with chemical emissions from building materials, especially if the ventilation system is not functioning properly. In this study, the indoor air quality (IAQ) was investigated in newly built low-energy and conventional preschools by monitoring the indoor air temperature, relative humidity, particle-size distribution and levels of carbon dioxide (CO2), nitrogen dioxide (NO2), formaldehyde and total volatile organic compounds (TVOC). The thermal comfort was satisfactory in all preschools, with average indoor air temperature and a relative humidity at 21.4°C and 36%, respectively. The highest levels of TVOC (range: 130–1650 µg/m3 toluene equivalents) and formaldehyde (range: 1.9–28.8 µg/m3) occurred during the first sampling period associated with strong emissions from building materials. However, those preschools constructed with environmental friendly building materials (such as Swan Eco-label) had lower initial TVOC levels compared to those preschools constructed with conventional building materials. The IAQ and indoor chemical emissions were also strongly dependent on the functioning of the ventilation system. Preliminary risk assessment indicated that exposure to acrolein and crotonaldehyde might lead to respiratory-tract irritation among occupants.

A systematic approach to assessing indoor air quality of long term care facilities

2018 ◽  
Vol 16 (4) ◽  
pp. 224-238
Author(s):  
M. te Kulve ◽  
M.G.L.C. Loomans ◽  
E.R.C.M. Huisman ◽  
H.S.M. Kort
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Systematic Approach ◽  
Long Term Care ◽  
Term Care ◽  
Care Facilities

A Study on IAQ in a Welding Laboratory

2013 ◽  
Vol 393 ◽  
pp. 947-952
Author(s):  
Ahmad Nazri Azmarini ◽  
Suhana Ab. Majid ◽  
Supa’at Hj Zakaria ◽  
Shaharin Anwar Sulaiman
Keyword(s):  
Air Quality ◽  
Relative Humidity ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Safety Concern ◽  
Health And Safety ◽  
Higher Learning ◽  
Dust Particles ◽  
Institutions Of Higher Learning

ndoor Air Quality (IAQ) has become an important occupational health and safety concern in educational environment at institutions of higher learning. In a survey conducted on a polytechnic in Malaysia, many of the students and lecturers expressed feeling of discomfort and uneasy due to resulting smoke from the welding activities while attending the workshop session. They felt that the room temperature and humidity also contributed to discomfort. Consequently, students had difficulties to concentrate and focus on their learning. The objective of this study was to determine the indoor air quality of a selected welding laboratory in the polytechnic comprising arc and gas welding stations. The important IAQ parameters considered in this study were the dry bulb air temperature, relative humidity, CO2 level and dust particles. Measurements were conducted using commercial IAQ instruments. From the study it was found that the levels of dust particles was higher than the recommended limit at times in the arc welding station. The CO2 level was observed acceptable in both welding stations. On relative humidity, a mixed result was found. Overall, the results implied that the welding laboratory require attention in meeting acceptable Indoor Air Quality.

Study of Indoor Air Quality in Academic Buildings of a University

2013 ◽  
Vol 315 ◽  
pp. 389-393 ◽  
Author(s):  
Shaharin Anwar Sulaiman ◽  
Nadrah Isa ◽  
Nina Irsyanizah Raskan ◽  
Noor Farhane Che Harun
Keyword(s):  
Air Quality ◽  
Relative Humidity ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Dust Particles ◽  
Lecture Room ◽  
Lecture Theatre ◽  
Academic Buildings ◽  
Academic Building

ndoor Air Quality in educational environment is very important as it could interfere with the learning process. In this paper, the indoor air quality of selected lecture rooms of different sizes in an academic building was studied, involving measurements of indoor temperature, relative humidity, CO2 level and dust particles. A mixed result was observed on the relative humidity in the rooms. The levels of dust particles were observed acceptable although recorded higher in the small lecture room as compared to the lecture theater. The CO2 content in the lecture theatre was found to be higher than that in the small lecture room, and also exceeded the maximum recommended level. Overall, the results suggested that the lecture theatre needs attention in the aspect of Indoor Air Quality.

scholarly journals Monitoring of indoor air quality in Macedonian homes during summer season

2018 ◽  
Vol 13 (1) ◽  
pp. 7-14
Author(s):  
Zoran Apostoloski ◽  
Silvia Vilcekova ◽  
Eva Kridlová Burdova ◽  
Ludmila Meciarova
Keyword(s):  
Air Quality ◽  
Relative Humidity ◽  
Indoor Air Quality ◽  
Air Temperature ◽  
Indoor Air ◽  
Sound Pressure Level ◽  
Sound Pressure ◽  
Pressure Level ◽  
High Exposure ◽  
Mean Values

Abstract Measurements of indoor air quality (IAQ) factors in Macedonian homes were aimed at the determination of indoor air temperature, relative humidity, sound pressure level, particulate matters (PMs) and total volatile organic compounds (TVOC). IAQ monitoring were performed in 25 houses during summer period. Results pointed out that sound pressure level were high in most of the houses with mean values of 66.60 dB (A) - 55.30 dB (A). Limit value of 40 dB (A) was exceeded in 72% of houses. Mean values of indoor air temperature and relative humidity ranged from 21.6°C to 28.6°C and from 35.8% to 60.2%, respectively. Mean concentrations of particulate matter concentrations ranged between 9.75 μg/m3 - 71.73 μg/m3 and 23.63 μg/m3 - 145.10 μg/m3 for PM2.5 and PM10, respectively. Level of PM10 were high in 30% of the monitored houses. 56% of houses achieved higher concentration of PM2.5 than permissible value of 25 μg/m3. Excessive presence of TVOC was recorded in monitored homes with mean values from 260 ppm to 791 ppm. Results show that high exposure by noise, concentrations of TVOC and PMs in indoor air can affect family house users. Therefore, the indoor air quality needs to be investigated and people need to be informed about possible health consequences.

scholarly journals Indoor Air Quality (IAQ): Accuracy of Natural Ventilation for Temperature, Air Flow Rate and Relative Humidity (RH) in School Building Classrooms

2018 ◽  
Vol 7 (3.9) ◽  
pp. 42
Author(s):  
Norsafiah Norazman ◽  
Adi Irfan Che Ani ◽  
Nor Haslina Ja’afar ◽  
Muhamad Azry Khoiry
Keyword(s):  
Air Quality ◽  
Relative Humidity ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Natural Ventilation ◽  
Air Flow ◽  
Weather Conditions ◽  
Potential Health ◽  
The Hours ◽  
Hot Weather

Indoor Air Quality (IAQ) is an essential matter in achieving students’ satisfaction for the learning process. Building’s orientation is a factor that may encourage sufficient natural ventilation for the classroom occupants. Inadequate ventilation is an issue for most existing classrooms. The purpose of this paper is to analyze the accuracy of natural ventilation in classrooms. Therefore, experimental on 20 classrooms has been conducted by using Multipurpose Meter at secondary school buildings in Malaysia. The findings indicated that the accuracy of natural ventilation testing was below the permissible limits throughout the hours monitored, thus this may cause potential health hazards to the students. Temperature and air flow rates were lower than 23 °C and 0.15 m/s respectively, it fulfilled the basic requirements as a standard learning environment. However, measurements taken showed the overall relative humidity (RH) in the classrooms can be categorized as acceptable with 40% to 70% range. On the basis of these findings, it is evident that naturally ventilated classrooms are important especially due to energy efficiency, whereas mechanical ventilation should only be installed as an alternative under extremely hot weather conditions.   

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