Adsorption
carbon filters – can trap almost every gaseous compound
with a molecular mass of more than 40 atomic units. Scientific
investigations conducted have indicated that adsorption filtration
does not provide any protection of light chemical compounds, such
as carbon monoxide, nitrogen oxide and formaldehyde. This makes
the adsorption technology not applicable for air purification of
most city airborne contaminants.
Requirement for frequent
filter replacement induced by the limited dust capacity of the devices
is another great disadvantage of the described technology. Inopportune
adsorbent replacement may transform the filter itself into a harmful
contaminant. Most popular today are the Philips and Honeywell adsorption
filters.
Trap toxic admixtures with a molecular mass of more than
40 atomic units; adsorb dust
Not effective for controlling most of the
city airborne contaminants
High maintenance costs
Inopportune filter replacement may turn the
device into a harmful contaminant
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