Air filters are generally physically simple yet technically complicated devices. Whether particulate or gas phase filters, they rely on a complicated set of mechanisms to perform their function. In many cases, more than one of these mechanisms comes into play.
Many new technologies have been employed in the effort to improve on the quality and performance of air filters, and in some cases to reduce their Life Cycle Cost (LCC). Some notable areas where advancement has been pursued are reduction in pressure drop and the application of various treatments to filter fibres. It is important to consider whether applying new technologies to air filter products is necessary and functional. In many cases it is, in some cases it isn't. Certain technologies, like ionic air cleaners, may be the cause of bi-products that may be harmful to the environment of people.
This section provides an overview of the technology of air filtration. It will provide a foundation from which you can converse with others about how air filters work. Remember, an air filter that is 100% efficient on the target contaminant, has zero pressure drop, and produces no bi-products is the target of all air filter researchers.