Effective measures against fine dust particles: The HEPA filter holds back all dust particles smaller than 10 µm (PM10) as well as ultra small particles. According to the DGUV 201-004 standard (formerly BGI581) it needs to conform at least to filter class H13 according to EN 1822 classification.
SEKA, however, insists to stay on the safe side. In order to maintain maximum protection we exclusively use filters according to HEPA H14 or ULPA U15 classification. In this way, we achieve a total filter effect of at least 99.9993%, which conforms to class H dust filters according to EN60335. Such filters are typically required for the safe removal of asbestos dust.
Filters on the basis of cellulose fibres might turn into a breeding ground for microorganism. For this purpose we exclusively use filters on the basis of glass fibres.
Activated carbon filter
Effectively removing gases and odors: After the air is virtually free from any dust particles, an activated carbon filter takes care of foul odors, toxic gases and fumes that might represent health hazards.
Activated carbon is usually made of carbon with a highly porous surface. This porous structure results in an extremely large inner surface. Gas molecules attach to the surface of the activated carbon either by sticking to it (adsorption) or as a result of chemical reactions (chemisorption).
A saturated filter surface looses its ability to pick up any further pollutants and needs to be exchanged.