This Standard specifies minimum requirements for the design, installation and commissioning of air-handling and water systems of buildings for the purposes of microbial control. It does not include requirements for refrigerated room airconditioners and non-ducted split systems.NOTE: Refer to regulatory authority for the application of the criteria to buildings.Requirements specified in this Standard are not intended for the control of the wide range of discomfort symptoms that may afflict the occupants of some buildings.NOTES: 1 The Standard covers the most common known sources of the diseases associated with air-handling and water systems of buildings. Other sources, both known and potential, include cooling water systems for refrigeration equipment and air compressors, industrial heat exchangers when opened for cleaning, decorative fountains, spray irrigation systems, and industrial water-based cutting fluid systems.2 In the event of an outbreak of legionnaire’s disease, special action is necessary, which will be advised by the health authorities.3 Further information on the control of microbial growth in air-handling and water systems of buildings is given in HB 32.4 HB 61 provides details of the standard specifications in the NATSPEC series.5 Operation and maintenance requirements are given in AS/NZS 3666.2.

First published as part of AS 3666-1989.Jointly revised and redesignated in part as AS/NZS 3666.1:1995.Second edition 2002. First published as part of AS 3666-1989. Jointly revised and redesignated in part as AS/NZS 3666.1:1995. Second edition 2002.