All buildings need a steady supply of fresh air and this is usually provided directly from outside via a grille, ductwork and a fan. Most systems work extremely well in fine weather. But many systems begin to have problems when the weather turns bad!...

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Today there are many types of cabinet and cabinet options. This application note aims to assist prospective buyers determine the cabinet type and options most suitable for their application....

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Cleanroom technology has developed into a specialist field with its own technical journals, its own conferences and exhibitions, and its own language of technical terms and classifications. This application note covers relevant standards and attempts to clarify the myriad classification systems....

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Cleanroom technology involves the control of air purity, airflows, air pressurisation and air temperature and humidity. It involves not just the air system, but the physical design of the room or space and the procedures required of the occupants of the room or space....

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In most food processing situations airborne contamination is not the major safety risk factor. Yet it must be considered as part of the Food Safety Programme because food is inevitably exposed to air which could potentially contain hazardous and undesirable contamination.

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The purpose of air filtration is to remove contaminants from the air. So the first step in selecting an air filtration system is to understand the contamination – what it is and how it is harmful. Ideally, the contamination level should be measured and an acceptable limit specified.

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In hospitals, negative pressure.

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Patient Isolation Rooms are used in hospitals for patients with infectious diseases such as TB and SARS. There are no NZ specifications or standards for such Patient Isolation Rooms. It is herefore up to the hospital to specify requirements for such rooms based on international "best practice."...

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Filter Integrity testing of installed HEPA filters is required in virtually all applications. It is specified in AS1386 Cleanrooms and clean workstations and in other international cleanroom standards.

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There are many classifications of filters and each system varies in its own needs. This application note defines the various classifications readily available today.

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Recirculating fume cabinet technology is a viable alternative to traditional ducted fume cupboards in many applications....

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