The smog filter is designed for effective filtration of the
so-called particulate matter. The PM2.5 and PM10 particles are
the main component of smog, which have an optical diameter
of 2.5 and 10 μm (micrometres).
The filtration efficiency (removal) of PM2.5 particles reaches up to 73%, and PM10
particles up to 81% (according to tests carried out with a dust
particle measuring device). The smog duct filter consists of
a sealed filter box and two filters: prefilter and smog filter.
It is recommended to install a smog filter on the supply ducts
in domestic ventilation and heat recovery systems.