Fume Cupboards in Senior Chem Labs

Fume cupboards in senior chemistry labs: With the changes to the Chem course with the Australian Curriculum, and the increased emphasis on organic chem, what are the recommendations for the number of fume cupboards in a lab to enable classes to do practical work? Thanks.

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Publication Date: 22 August 2016
Asked By: Kathleen Lacey
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Fume Cupboards in Senior Chem Labs

Existing recommendations

In brief, there are no formal written recommendations that we are aware of. Australian educational jurisdictions indicate that fume cupboards are required in science areas, but do not specify the numbers required.1,2,3 &4 Registration requirements for non-government schools in WA specify that schools should comply with Australian standards in high-risk areas such as science5. However, the standards do not make any recommendation for the number of fume cupboards that should be included in a school science area6. Science ASSIST is in the process of developing guidelines for science facilities in Australian schools. The guidelines are due for release late 2016.

Curriculum requirements

Fumes cupboards are invariably incorporated into laboratory preparation areas, as they are essential for laboratory technicians in the preparation of reagents and dispensing of chemicals. It is usual for school science areas to also have at least one fume cupboard that can be accessed from a teaching laboratory for use by teachers and students in demonstrations and activities involving hazardous chemicals. Having at least one such fume cupboard is arguably essential in order to meet current expectations of safe practice.

Access to good facilities is integral to the delivery of a meaningful program for students. There is a growing emphasis for students to engage in hands-on activities rather than watch demonstrations or videos. The nature of chemistry practical work has the potential to expose staff and students to volatile, corrosive, irritating, toxic, or sensitising powders, fumes and vapours. It is therefore essential that there be sufficient controls in place to minimise the risk of exposure. An effective engineering control that provides protection from airborne hazards is the provision of an Australian Standards-compliant fume cupboard.

Whilst schools may be able to make do with existing facilities, if they want to offer opportunities for students to experience engaging hands-on activities, then schools need to consider the optimum facilities to enable this.

Fume cupboards are a significant capital expense and careful consideration is necessary in determining how many are required. We suggest that you carefully consider your curriculum program to assess your requirements for student access to a fume cupboard. You could also document your current demand for access to a fume cupboard as evidence to support the need for the provision of a new installation.

Alternative Risk Management strategies

Where there are insufficient fume cupboards to allow students concurrent access, then risk management strategies need to be implemented, such as:

  • adjusting the laboratory timetable as necessary to enable classes to access the fume cupboard when required;
  • strategic management of practical activities such as running different activities concurrently, including those that do not require a fume cupboard, so that students can rotate through the activities and access the fume cupboard one group at a time;
  • conducting activities on a microscale in a well-ventilated room to minimise the volume of hazardous vapours; and
  • conducting teacher demonstrations.

Fume cupboard specifications

Two different types of fume cupboards are available: ducted fume cupboards (either single- or double-sided) and recirculating fume cabinets (see below). While they have some common features, there are important distinctions in the applications for which they are designed. The following aspects of ducted fume cupboards should be considered.

  • All fume cupboards should be compliant with and sited and installed according to AS/NZS 2243.8 Safety in Laboratories Part 8 Fume cupboards.
  • A wider fume cupboard allows for better visibility for demonstrations and also access for more than one group to work concurrently, depending upon the task and the students.
  • Effective airflow in double-sided fume cupboards can be compromised if there is a pressure differential between the rooms that share the fume cupboard. If installed, a double-sided fume cupboard must have duplicate controls and emergency isolators on each side.
  • Shared fume cupboards are not a preferred option for preparation laboratories. Best practice is for the preparation laboratory to have its own fume cupboard to handle sources of hazardous vapours during preparation operations. This will avoid interruption of adjoining classes and exposure of the students and teacher to hazardous preparation procedures.
  • Installation is probably less expensive during the construction of a new facility rather than retro-fitting.

Recirculating fume cabinets are sometimes promoted as an alternative to built-in ducted fume cupboards because they are portable, cheaper, and easier to install because they don’t need exhaust ducting. Recirculating fume cabinets have numerous limitations and therefore we do not recommend this type of fume cabinet for use in school science laboratories. For more detailed information, see Science ASSIST Information Sheet AIS: Recirculating fume cabinets.

Related questions

Some previous related questions that we have answered are:

Chemistry Experiment regarding organic practical activities and the use of a fume cupboard;

Chemical Waste from Ester Prac regarding disposal of ester waste;

organic chemistry regarding disposal of ester waste.

References

Educational Facilities, Standards and Guidelines (EFSG). New South Wales Education website. https://efsg.det.nsw.edu.au/ (Accessed September 2016)

2 Infrastructure Division, Department of Education and Early Childhood Development. 2011. Building Quality Standards Handbook. Victorian Department of Education and Early Childhood website, http://www.education.vic.gov.au/school/principals/spag/infrastructure/Do...

Queensland Department of Education, Training and Employment. 2014. Design Standards for DETE Facilities, Queensland Department of Education and Training website, http://deta.qld.gov.au/corporate/pdf/design-standards-dete-facilities.pdf  

SA Department for Education and Child Development. 2015. DECD Design Standards DECD14/5606, July 2015, DECD website, https://www.education.sa.gov.au/sites-and-facilities/facilities-maintenance-and-design/building-design-specifications-sa-government

Department of Education Services Non-government schools. 2016. Guide to the Registration Standards and Other Requirements for Non-government Schools 2016. The original 2016 version of this document is no longer available. instead, please see the updated version of this document for 2018 at the following URL: https://www.education.wa.edu.au/documents/43635034/0/2957-RegistrationSt...

Standards Australia. 2014. AS/NZS 2243.8: 2014 Safety in Laboratories Part 8 Fume cupboards, Standards Australia: Sydney

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