‘Air changes per hour’ is the number of times the air is replaced in a defined space each hour. The number of these air changes that are required for a specific space is defined by its use. For example, the HSE guidance note EH22 ‘ventilation of the workplace’ requires 8 air changes per hour with a minimum requirement of 3 air changes per hour.
Guidance also recommends an air supply of 8 litres/second per person for open plan offices and a minimum of 5 litres/second per person for air conditioned spaces.
The Workplace (Health, Safety and Welfare) Regulations 1992, regulation 5 requires that ventilation systems are appropriately maintained in an efficient state and working order. Regulation 6 requires that you ensure effective ventilation for any enclosed workplace by providing a sufficient quantity of fresh air.
We can combine an air change test within a full air quality survey for work spaces to include particulate monitoring, bio-aerosols and VOC’s as well.
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