Iranian Journal Of Health Sciences

en Study of Dioxide Carbon Concentration and Indoor Air Quality in Some Buildings in the Equatorial Region of Cameroon (Yaounde) بهداشت محیط زیست Environmental Health پژوهشي Original Article Background and purpose: Elevated CO2 rate in a building affect the health of occupant. This document presents results of an experimental analysis conducted in 50 offices located in 12 buildings with different layer in Cameroon (Yaounde). This study took place in 2012, during the dry and the rainy seasons. The main goal is to show the influence of the building structure, the ventilation and the number of occupants on the CO2 concentration in buildings. The areas chosen were ventilated at 60%. Materials and Methods: A questionnaire was distributed to occupants. The different values in terms of temperature, air speed, humidity, CO2 concentration and luminosity rate were measured simultaneously during working hours and without the occupants. The measurement took place while offices were naturally ventilated. Values obtained were analyzed and integrated. Results: Painted buildings with glasses were more pollutant than those made with soil and wood. A mechanically controlled area was more comfortable but more pollutant than a naturally ventilated area. Conclusion: The CO2 concentration changes exponentially when the number of people in a hall increased especially when there are smokers. For temperature ranged from 20.5°C to 28.8°C and the CO2 from 350ppm to 1450ppm, the average consumption of O2 by person varied between 0.0097cfm and 0.0162 cfm. CO2 Concentration, Indoor Air, Buildings, Equatorial Climate, Health 1 15 http://jhs.mazums.ac.ir/browse.php?a_code=A-10-396-3&slc_lang=en&sid=1 Modeste Kameni Nematchoua 10031947532846004079 10031947532846004079 No Environmental Energy Technologies Laboratory René Tchinda 10031947532846004080 10031947532846004080 No 2LISIE, University Institute of Technology Fotso Victor, University of Dschang, Cameroon, José A. Orosa 10031947532846004081 10031947532846004081 No Department of Energy and M. P. Escuela Técnica Superior de N. y M, University of A Coruña, Paseo de Ronda 51, 15011 A Coruña, Spain Gholamreza Roshan ghr.roshan@gu.ac.ir 10031947532846004082 10031947532846004082 Yes Department of Geography, Golestan University, Gorgan, Iran