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Air Legal Requirements and Legislation

Providing Quality Service Nationwide

The Law


The workplace (Health, Safety and Welfare Regulations 1992) Regulation 5 imposes a duty to clean mechanical ventilation systems “as appropriate”. These Regulations are accompanied by an Approved Code of Practice or ‘ACoP’ in order to assist the persons responsible with the implementation of the regulation.


ACoP 33 States


“Mechanical ventilation systems (including air conditioning systems) should be regularly and properly cleaned tested and maintained to ensure they are kept clean and free from anything which may contaminate the air”.


The ACoP therefore calls for regular cleaning and testing. Many of the country's leading building management organisations have published documents detailing methods of implementing this ACoP. These include:


  • BSRIA TN/18/92

  • BESA TR/19

  • CIBSE TM26

  • CIBSE TM44



The most commonly used of these are BESA TR/19 and CIBSE TM26.

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