In a previous blog, we explored three ways vacuum filtration helps prevent food contamination in food processing facilities. Here we’ll look specifically at HEPA filtration and why a certified HEPA vacuum should be part of the housekeeping arsenal in all manufacturing processes.
What is certified HEPA filtration?
HEPA stands for “high-efficiency particulate air” (or, sometimes “high-efficiency particulate arrestance”). Essentially, what this means is that HEPA filters are very good at capturing particles that are very small. According to the U.S. Department of Energy, to qualify as HEPA, a filter must be -- at a minimum -- 99.97% efficient at trapping and retaining particles down to and including 0.3 microns. In practice, HEPA filters generally reach even higher efficiency levels for larger particles. To be considered certified HEPA, a filter must be individually tested and verified. These filters are also known as true HEPA. This distinction is important, because there are many filters on the market labeled HEPA-type, HEPA-like, or something similar. These filters have not been individually tested or verified, so their efficiency can’t be guaranteed.Why is certified HEPA filtration essential to industrial processing?
When purchasing a vacuum cleaner for your facility, make sure to select one that’s certified HEPA. Here’s why.It will remove the vast majority of potential contaminants
At 0.3 microns, a certified HEPA filter can remove the most troublesome pathogens and allergens from the processing environment. For reference, here are sizes of some common contaminants:- Bacteria: 0.35 to 10 microns
- Plant spores: 6 to 10 microns
- Mold: 20 to 200 microns
