Holopainen R., Tuomainen M., Asilainen V., Pasanen P., Säteri J.; Seppänen O.
Bibliographic info:
Indoor Air 2002, Vol 12, n° 3, pp 191-197, 1 Fig., 3 Tab. , 13 Ref.

A contaminated supply air system may have an adverse effect on indoor air quality. The aim of that study was to evaluate the effectiveness of different protective actions in achieving a clean supply air duct system on the one hand and to find out the location in the ductwork where most of the duct is accumulated. Measurements were made and presented in tables.
It appears that dust accumulation can be partly avoided by ducts protection during the whole of the construction transportation and storage phases and that no ducts with residual oil on the inner surface should be used.