Maintaining good indoor air quality on site is essential. It optimizes contamination control and ensures audit compliance. Furthermore, it improves the shelf life of your products and contributes to a safe working environment for your employees.
Without proper controls in place, air can be a source of contamination. It can act as a transport medium, moving contaminants from one area to another. These contaminants can include fungal spores, coarse dust and pollen (PM10 – where the concentration of particles that are less than or equal to 10 µm in diameter), fine dust and microorganisms like yeast (PM2.5) and microorganisms like viruses and bacteria (PM1).
Filtration & Good Indoor Air Quality
Filter Stages and Grades
There are typically three filter stages needed to adequately filter our contaminants in food production areas. However, there is no one size fits all. Consequently, only a thorough risk analysis of the individual area can determine the correct specification for each filter stage.
Find out more about air filter classifications here.
High risk or cleanroom production areas will need to meet the highest standards of food safety. Therefore, filters for these areas should be capable of filtering out the smallest microbes, will need to be suitable for operation up to 100% relative humidity and be resistant to mechanical stress. In addition, filters should meet the ISO16890 standards and higher pre-filtration grades should be installed. Air management should also take into account optimum room pressurisation and number of air changes. Furthermore, for good indoor air quality, air movement, temperature and humidity should be monitored carefully.
In addition to choosing the correct filter grades, your filters should be changed regularly and to a set schedule and your air handling system should be cleaned on a similar basis. Cleaning should include the sides, wall and floor of the air handling unit (AHU), metal/fabric ducting, fan, cooling coil, heater battery, motor etc. These are all components which can harbour contaminants.
The HVDS Risk Assessment
HVDS provides a risk assessment template, which helps you evaluate your air handling requirements for good Indoor Air Quality on site. Devised by our Indoor Air Quality experts, the template is a checklist to help you prioritise your actions to achieve BRCGS Food Safety Issue 8 audit compliance. Find out more here.
For information and advice on any of the above, please get in touch on 01785 256976 or contact us here.