HEPA filter testing
High Efficiency Particulate Air (HEPA) filters have been used as filtration devices for more than 50 years. Their high efficiency at sub micron particle sizes makes them suitable in areas where cleanroom conditions and contamination control within the room served and from the room are critical.
HEPA filter testing is extremely important to confirm that the filters are properly installed, with no leaks due to manufacturing defects or installation workmanship. The test is made by introducing an aerosol challenge upstream of the HEPA filter and scanning immediately downstream of the filters and support frames. The installation integrity tests are conducted in accordance with AS 1807.6: Determination of integrity of terminally mounted HEPA filter installations and AS 1807.7: Determination of integrity of HEPA filter installations not terminally mounted.
Airlab is an IANZ accredited, experienced testing laboratory for these test methods. This gives the client the added confidence that the tests and results achieved will be accurate, and as we do not sell filtration equipment, at all times totally independent.
When should integrity of HEPA filters be performed?
This depends on the type of installation the filters are utilised in and the absolute level of confidence the client requires for the operation of the facility. In some circumstances the testing frequency may be a requirement to meet TGA and FDA requirements or as dictated by company procedures or compliance with other standards and guidelines such as Australian and ISO Standards.
Particular bio-containment facilities may also have stringent requirements and the need for the decontamination of filters prior to testing and maintenance. Where the client is unsure we will be able to advise them further. However a general rule of thumb, notwithstanding particular requirements, is that all HEPA filters be integrity tested in accordance with the above mentioned methods upon installation and at least twelve monthly intervals thereafter.