Abstract
Indoor air quality is affected by many factors, including energy provision/use. The main objective of this research was to investigate indoor air pollutant emissions due to energy use in residential buildings, with a specific focus on particulate matter (PM). Three environments were compared: (a) a rural house with an electric cooker; (b) a city-centre flat with a gas cooker; and (c) an urban flat on a main road, also with gas appliances. Concentrations of PM, CO, NO2 and VOCs were measured in the kitchens and emission rates were calculated for cooking periods. Although there has been a great deal of research examining the effects of gaseous pollutants in the indoor environment, this is one of the first studies to specifically focus on PM. Most particles were small (≤2.5 µm) and thus respirable. The elemental analysis of the PM revealed high metal concentrations (Fe/Na/Zn), whilst their morphologies indicated these were present as salt, skin and particles of biological origin. Gaseous emissions, particularly NO2 and CO, were more prevalent in homes with gas appliances, since these are a significant source of both pollutants.
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