Describes the monitoring of indoor air quality in a San Francisco office building where occupants had registered eye, nose and throat irritation complaints. Data was taken under two different ventilation rates. Carbon dioxide concentrations increased as the ventilation rate decreased, odour perceptibility increased slightly at the lowest ventilation rate, and other pollutants generally showed very low concentrations, which increased when ventilation was reduced.
In dwellings and similar spaces with limited volume, dilution of indoor air contaminants may be insufficient. The concentration of contaminants in the inside air depends partly on the rate of emission into the room, partly on the ventilation and the concentration of impurities in the outside air. Sulphur dioxide, hydrocarbons, ozone and lead compounds occur in higher concentrations in the outside air, whereas nitrogen oxides, carbon monoxide, benzpyrene (from tobacco smoke), formaldehyde and dust have higher concentrations indoors.
Describes a sampling system developed to collect, analyze and identify organic contaminants in air over as wide a range of molecular carbon number range as possible. Describes sampling technique and reports results of sampling in 36homes in the Chicago area. Two samples were taken simultaneously inside and outside. Fifteen homes were sampled in both summer and winter.< Concludes that people are exposed to a wide range of organic compounds on average at concentrations of below 100ppb.