Activated carbon typeThe activated carbon medium for acidic gas removal consists of chemically modified carbon, suitable for acidic and corrosive environments.it effectively removes about 90% of pollutant gases,including sulfuric acid,
sulfur dioxide,and volatile organic compounds (VOCs).The activated
carbon medium for alkaline gas removal effectively eliminates ammonia gas, removing about 90% of pollutant gases.The
filter medium reacts with pollutant gases to form inorganic
salts,which are not easily resolved. The adsorption reaction
mechanism is immediate, safe, and permanent.
In the air filtration industry, there are numerous standards for
classifying, identifying, and evaluating the various performance
characteristics of air filters.
In the United States, the organization responsible for setting
these standards is ASHRAE. Since 1968, ASHRAE has released a series
of test standards for air filters, which have been recognized by
the American National Standards Institute (ANSI) as the benchmark
for filter performance classification.
In Europe, reference was made to ASHRAE standards, and CEN formally
released the European filter standard EN 779 in 2012. In 2012,
EN779 was revised for the second time, and the new standard defined
the minimum filtration efficiency (ME) for F7-F9 efficiency
filters, thus ensuring better air quality at the AHU outlet.
At the same time, to support the selection of energy-efficient air
filters, EUROVENT (the European Association of Manufacturers of
Refrigeration, Air Conditioning and Heat Pumping Equipment)
developed the "Eurovent 4/11" guidelines in 2012 and upgraded it in
2015. The guideline is based on the EN 779:2012 standard for energy
consumption calculation and is classified according to energy
consumption. This tool enables us to select high-efficiency filters
based on the standard and ensure lower energy consumption,
providing the best solution for users.
In 2016, the ISO 16890 standard was introduced, providing the
possibility of global standardization in the air filtration
industry and replacing the existing two regional standards: ASHRAE
52.2 and EN779:2012.
