The APP reaction chamber not only create a plasma zone, they also possess a very high electrical field strength and thereby act as a very efficient compact electrostatic precipitator (ESP). This means that any particulate matter and dust passing through the chambers will be strongly attracted to the sides and be removed from the gas flow. Measurements have shown that the system is very effective in removing fine dust and submicron particles of 2,5 micron (PM2,5) and below.