caa a22 4500 39750215X CHVBK 20180308164535.0 cr unu---uuuuu 161202e19950701xx s 000 0 eng 10.1093/oxfordjournals.rpd.a082722 doi 0144-8420 pii (NATIONALLICENCE)oxford-10.1093/oxfordjournals.rpd.a082722 Effectiveness of Finish Materials and Room Air-Conditioner on the Reduction of Indoor Radon Concentration in Hong Kong [Elektronische Daten] [A.K. Ma, C.K Man, E. Ho, S.W. Pang] Four different kinds of finish material were investigated: wallpaper, paint, plaster and tile. When applied to the bare concrete walls of uninhabited rooms in flats of a building under construction, all of them were found to reduce indoor radon concentration. The magnitude of reduction by these finish materials ranged from 20% to 80%. Wallpaper was found to provide the best protection against radon emission from bare concrete walls in a bedroom with a size of 19.3 m3. Wallpaper can reduce the indoor radon concentration about twice as much as paint (water-based) or plaster in this investigation. Tile was also found to be a good material against radon emission from concrete walls in a bathroom with a size of 6.3 m3. Indoor radon concentration was found to decrease with elevation from the ground level, and was affected strongly by mechanical ventilation. Another 30% to 50% reduction in indoor radon concentration in addition to finish material can be achieved by a room air-conditioner, simply by turning the fan on and setting it in the 'high' position. It was also found that indoor radon concentrations were not affected by turning the fresh air shutter to the 'on' or 'off' positions in the room air-conditioner. Radiation Protection Dosimetry Ma A.K. aut Man C.K. aut Ho E. aut Pang S.W. aut Radiation Protection Dosimetry Oxford University Press 60/3(1995-07-01), 237-241 0144-8420 60:3<237 1995 60 rpd https://doi.org/10.1093/oxfordjournals.rpd.a082722 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/oxfordjournals.rpd.a082722 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ma A.K. aut NATIONALLICENCE 700 1- Man C.K. aut NATIONALLICENCE 700 1- Ho E. aut NATIONALLICENCE 700 1- Pang S.W. aut NATIONALLICENCE 773 0- Radiation Protection Dosimetry Oxford University Press 60/3(1995-07-01), 237-241 0144-8420 60:3<237 1995 60 rpd Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford