Measurements of @entity1223 and XXXX in British homes using unflued heating or cooking appliances.

@entity982 @entity7459 @entity6836 @entity1223
Measurements of @entity1223 (CO) and @entity7459 ( @entity6836 ) were made in three kitchens, two with gas cookers and one all electric, and two living rooms, one heated by a portable butane heater and the other by a paraffin stove. The measurements were taken whilst the homes were in normal use and the occupants kept a diary of when specific appliances were used. Measurements of @entity6836 were made simultaneously by chemiluminescence and by diffusion tubes. The accuracy of the diffusion tube measurements relative to the chemiluminescent standard was estimated as +/- 10% and the precision less than or equal to 300 ppb. hr. Results from diffusion tubes were used to indicate the distribution of @entity6836 throughout other rooms in the house. At the all electric house the CO and @entity6836 concentrations were very similar to the expected outdoor levels. In all the other houses @entity6836 levels exceeded typical outdoor concentrations measured in Central London and in the paraffin heated house and one gas cooking house median CO concentrations exceeded these measured at the curbside of a very busy road in Central London. The living room concentrations of @entity6836 where the @entity982 heater was in use were elevated for long periods. Analysis of the decay of pollutant concentration in one kitchen yielded an effective deposition velocity for @entity6836 of 3 X 10(-5) m s-1. The magnitude of the CO and @entity6836 concentrations measured in this survey confirms that indoor air pollution should be taken into account when assessing overall public exposure to air pollution.
