TITLE:
Numerical Experiments on Indoor Air Quality Considering Infiltration of Mould from Crawl Space
AUTHORS:
Motoya Hayashi, Haruki Osawa, Kenichi Hasegawa, Yoshinori Honma
KEYWORDS:
Biological Pollutant, Filtration, Mould, Ventilation, Air Leakage
JOURNAL NAME:
Journal of Environmental Protection,
Vol.5 No.10,
July
25,
2014
ABSTRACT: How the air quality of crawl space influences the indoor air quality is
investigated using a simulation program “Fresh 2010”, air leakage network
models, and the measurement results on the mould concentrations in crawl spaces
of detached houses. The annual changes of indoor mould concentrations were
calculated using building models (a common wooden post-and-beam structure,
improved wooden post-and-beam structure, wooden stud structure). In every
structure, the concentrations in the case of exhaust ventilation system are
higher than those of exhaust and supply ventilation system. The results show
that it is necessary to control the air quality of crawl spaces and the
infiltration from crawl spaces in order to keep indoor air quality good.