Author(s)

C. Cavletti, G.F. Cellai, G. Raffellini & F. Sciurpi

Abstract

Air quality and ductwork contamination: state of the art and guidelines C. carletti', G.F. ~ellai', G. ~affellini' & F. ~ciurpi' '~e~artment of Tecnologie de1l1Architettura e Design "P. Spadolini': University of Florence, Italy. Abstract 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. 1 Introduction HVAC systems play an important role in maintaining good indoor air quality and correct indoor environmental parameters for the health and comfort of building users. However, there exists a substantial body of lit

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