Here the fan is installed clean-air sided which is behind the filter; this implies that no chip-loaded air is conveyed via fan, the deduster resp. dust extraction filter is under intake pressure.
Clean air fans have an efficiency more than 80%.
The intake pressure/ vacuum filter principle does only function with a completely encased filter.
Clean air filters of a suction up to 6.000 m³/h are allowed to be installed in working rooms if they are certificated for use category H2.
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