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.
The filters are the most inexpensive part to improve
It is well known that building ventilation costs
are significant. The “typical” energy cost of filters as a percentage of the total system is approximately 30%. Selecting the correct filter, i.e.
Camfil Farr F7 filter efficiency and lowest pressure drop, can create significant savings on energy while maintaining healthy Indoor Air Quality (IAQ)
1 Pa = 1 Euro
A rule of thumb, for a typical installation running half time over one year, is that one additional Pascal in pressure drop over a filter adds 1 Euro
in extra energy cost. A bad filter design can add
50 Pascal compared to a “good” design. In other words it adds 50 Euro on the annual energy
bill – per filter!
