Air Filter Performance and How Performance is Tested

The performance of a filter is generally evaluated based on four parameters.

These is included :

* Contaminate removal effiency



* Contaminate holding capacity



* Resistance to airflow



* Safety with regard to support or spread of fire and smoke

Contaminant removal efficiency is tested by challenging the filter with contaminant on the           upstream side and measuring the residual contaminant on the downstream side of the filter after the air has passed through the media. Various methods and instruments have been developed for moving the air through the filter, holding the filter, generating and dispursing the challenge, and measuring the challenge on the upstream and downstream side of the filter.

Fine Fiber Media Air Filters - These filters utilize filter media with fibers small enough in diameter to allow for the capture of sub-micron particles at high efficiencies without the necessity of electrostatic attraction. Fine fiber media is often made of glass fibers or PTFE.