THE AIR WE BREATHE
Air is a mixture of gases composed of approximately 21% oxygen, 78% nitrogen, 1% argon, and traces of other gases. The air we breathe also includes…
EFFECT OF MEASURING METHOD
Work done under the sponsorship of ASHRAE and private organizations such as filter manufacturers showed that the percentage distribution of…
MECHANISM OF AIR FILTER
The total efficiency of a filter is the sum of the four filtration effects. Under certain conditions, total efficiency will have a certain minimum value.
TEST METHODS
There are basically two sources for filter testing; USA based standards (ASHRAE, IEST; MIL) or European based standards (CEN; EN779 and EN1822)…
HEPA FILTERS
The use of HEPA filters used in air conditioning systems in clean rooms is increasing day by day in pharma, food and hospitals.
CHEMICAL FILTRATION
The chemical filtration media consists of pellets that absorb the polluting gases in the air by chemical reaction and does not work like filter media in…
EN 779
EN779: 2012, consisting of groups G and F, consisting of the groups G, M and F, has been revised with EN779: 2012.
EN 1822
Effective air filtration (EPA), for example in the pharmaceutical industry, where the ventilation and conditioning systems are applied in the cleanroom.
EN ISO 14644-1
EN ISO 14644-1 standard; clean rooms and clean rooms are classified according to the concentration of airborne particles, especially airborne…
