HVAC, DUST COLLECTION, PAINT AND FINISHING

High Efficiency Particulate Air filters (or “HEPA”) is, unfortunately, a broadly used term to describe air filters for a variety of applications. However, many air filters that include the word ‘HEPA’ as part of their description may not meet the standard as it has been defined. At the time of writing, US government standards state that filters meeting the HEPA designation must remove 99.97% of any particle that passes across the filter media with a size of 0.3 micron. Additional standards stipulate that the filter must meet this efficiency with minimal pressure drop and maximum air flow when in operation.

HEPA filters are manufactured with a range of dimensions, frame materials/shapes, operating temperatures and air flow capacities. HEPA filters are carefully specified for each application, and this process requires expertise and care to be taken when selecting the correct part.

For the most demanding filtration applications, Ultra-Low-Particulate (ULPA) filters are also available, which are specified to remove 99.999% of particulate 0.12 micron or larger.