Most mechanical ventilation systems are out of sight, but due to recent legislation, they can no longer be put out of mind.
The Health & Safety at Work Act 1974 placed a 'common duty of care' on employers and persons concerned with premises in relation to employees and others who may use or visit the premises. Section 2 (2) (e) requires employers to "provide and maintain a working environment that is, so far as is reasonably practicable, safe and without risk to health" The Management of Health & Safety at Work Regulations 1999 (Regulation 3) places a specific duty on every employer to make a "suitable and sufficient assessment of the risks to the health and safety of his employees to which they are exposed whilst they are at work and the risk to the health and safety of persons not in his employment".
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' A survey can range from a free no obligation inspection to detailed reports containing independent laboratory analysis or CCTV inspections to satisfy these requirements. The surveys are tailored to suit individual client requirements and the systems under review. Survey methods include: NADCA Dust Sampling Air and Contact Microbial Sampling Wet Film Thickness Testing Photographs CCTV inspections