HEPA (High Efficiency Particulate Air) filters provide, by far, the highest level of capture efficiency available for microscopic particles and microbes, with the ability to capture even tiny, invisible particles that can pass right through a MERV 16 filter. That’s why every filtration system Abatement Technologies sells for critical air filtration applications such as hospital infectious patient isolation, asbestos abatement and mold remediation is equipped with a HEPA filter.
A true HEPA filter must provide minimum filtration efficiency of 99.97% against particles 0.3-microns (0.00014 inches) in size, in accordance with stringent standards developed by the Institute of Environmental Sciences and Technology (IEST). Allergens and biological pollutants in this size range can include smoke particles, bacteria viruses, asbestos, and some mold and fungal spores.
Some other filtration devices such as electronic air cleaners can provide high initial efficiency when the collection plates are clean, but efficiency can plummet as they get dirty. The beauty of a HEPA filter is that its efficiency starts at 99.97% and actually improves as the filter loads. Because of the exceptional small-particle capture performance of CAP600 Series and CAP1200 Series models, these units are the most widely recommended for homes with family members who are asthmatic or have the highest sensitivity to respiratory allergens.
How they work ?
CAP600 and CAP1200 Whole-House HEPA Air Purification Systems are designed for professional installation into the HVAC air return duct near the air handler, in an out of the way location such as a basement, crawl space or attic. A ‘partial bypass’ installation configuration enables the CAP unit to purify up to 50% of the ‘dirty’ air flowing through the HVAC return during each pass through the HVAC system. Typically, the entire air volume in the home can be filtered up to 50 to 60 times in a 24 hour period. Peak air quality levels in the home are typically reached and maintained within the first 24 to 48 hours of use.