Holopainen R, Tuomainen M, Asikainen V, Pasanen P, Säteri J, Seppänen O
Year:
2002
Bibliographic info:
Proceedings of Indoor Air 2002 (9th International Conference on Indoor Air Quality and Climate) - June 30 - July 5, 2002 - Monterey, California - vol 1, pp 705-710, 11 refs, 1 tab

The aim of this study was to evaluate the amount of dust in supply air ducts in 18 recently installed ventilation systems constructed according to two different class of cleanliness. Dust accumulation into the duct can be partly avoided by duct protection during the whole of the construction phase. Therefore, ducts should be manufactured using a method in which the inner surface of the duct has no residual oil but the ducts should also be protected against impurities during transportation, storage and construction (steel fillings were found close to the openings where ducts have been cut with an abrasive cutting machine..).