“…For example, differences have been observed between apartments and houses, 6 ventilation systems, [8][9][10][11] ventilation rates, 1,6,[12][13][14] or dwellings with gas cookers, 3 renovations, 15 smokers or even the additional emissions associated with the storage of paints and cleaning materials within attached garages. 1 Significantly, these studies have indicated the influence upon IAQ of occupancy and human activity, 1,16,17 the presence of indoor sources of pollutants, 3,10,18 and ventilation rates. 1,6,12,[19][20][21][22] Measurement and numerical studies have examined the impact of air purifiers, upon various pollutants within apartments.…”