The Workplace (Health, Safety & Welfare) Regulations 1992 (Regulation 5) requires that equipment, devices and systems "shall be maintained (including cleaned as appropriate) in an efficient state, in efficient working order and in good repair"
Various cleaning devices
Regulation 6 section 33 states that "Mechanical ventilation systems (including air conditioning systems) should be regularly and properly cleaned, tested and maintained to ensure that they are kept clean and free from anything which may contaminate the air." The risk assessment process should define if and when a system requires cleaning by defining: What is 'a suitable and sufficient' assessment of risk. When it is 'appropriate' to clean.
What is a 'suitable system of maintenance'. What are 'suitable intervals' for maintenance. What validation of the maintenance program is required for 'a suitable record' If cleaning is required, Sani-Duct utilises various methods and devices, depending on system design, access, extent and type of contamination. Prior to cleaning, a programme of works is discussed and agreed with the client, from which a detailed Method Statement and Risk Assessment are compiled. Many systems require additional access points to enable the cleaning works. These are installed at regular intervals and before and after obstacles such as Volume Control Dampers (VCD's), Turning Vanes and Fire Dampers in order to perform the cleaning works effectively. These access points also enable any future routine inspections or cleaning works to be undertaken with ease. All cleaning works are performed to internationally recognised standards. Following cleaning, a system can be sealed to provide long term protection of the indoor environment. Sealing the internal surfaces of a system negates against corrosion of the surfaces and inhibits the microbial activity of micro organisms within the system. Post cleaning reports are tailored to the clients' requirements and can consist of photographic evidence, microbiological air and contact sampling with independent laboratory analysis, dust sampling, wet film thickness testing, recommendations and certification.