The model demonstration house described in this paper was designed to optimize occupant health by minimizing indoor air pollution. This was accomplished by the use of three primary principles: ELIMINATION, SEPARATION, AND VENm.ATION.1 Pollutant source strength reduction has come to be regarded as the most effective method of reducing indoor pollution. This is often easily achieved by ELIMINATING potentially polluting materials wherever possible, and using more benign low outgassing materials instead.
Indoor radon concentrations, radon emanation rates from building surfaces, radioactivity contents of building materials and the indoor gamma dose rates for Hong Kong are all in general higher than values obtained elsewhere. An interesting phenomenon has been noted that the values of indoor radon concentrations and radon emanation rates from building surfaces in Hong Kong tend to decrease with the age of the buildings, while the absorbed gamma dose rate remains about the same.
Richard Tully gives practical advice on ventilation requirements for underground car parks, emphasizing the need to remove fumes quickly from exit ramps where vehicles emit up to half as much carbon monoxide again as on the level.
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