The belief that the addition of mass to a building will reduce its energy requirement is now widespread. Fiona Cousins and Bob long investigate how this principle, often observed in the coolness of cathedrals, castles and caves during summer, can be applied to modern buildings
The primary objective of this study was to evaluate the effectiveness of different commercially available portable indoor air cleaning technologies in removing dust particulates from the indoor air. Suspended respirable particles are of great concern and often identified as important source of indoor air quality problems. The concentrations of particulate and gaseous pollutants encountered in the indoor environment frequently exceed those found outdoors by factor ranging from 2 to 20.
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