Air quality and ductwork contamination: state of the art and guidelines

摘要

If the design, installation and maintenance of HVAC systems does not follow suitable standards, they can give rise to several problems, such as: excessive installation and maintenance costs as well as hygienic problems for dust deposition and accumulation. The paper deals with the state of the art duct contamination. The paper also presents the used methodology and the obtained preliminary results of a study carried out on ten hospital buildings. Finally some considerations about the effectiveness of some cleaning methods are presented.