CONTEC give you several different possibilities for optimizing dust collection with the R2D2 Dust Extraction Systems. The combined results are phenomenal!
 

• CARTRIDGE FILTERS
• The cartridge filters are automatically cleaned during operation by compressed air.
• The filter unit includes the filter cartridges and the dust container/s.
• The filter unit is available in two versions. The first version collects the dust in a wheel barrow. The second version collects the dust in buckets which can be equipped with plastic bags
•  HEPA FILTER- (High-Efficiency Particulate Air) filter
  HEPA filters are designed to target a range of particle sizes. Filters meeting the HEPA standard must satisfy certain levels of efficiency. Common standards require that a HEPA air filter must remove—from the air that passes through—at least 99.95% (European Standard) or 99.97% (ASME, U.S. DOE) of particles whose diameter is equal to 0.3 μm; with the filtration efficiency increasing for particle diameters both less than and greater than 0.3 μm
• LONGOPAC dust collection system.
  This is an “endless” collection bag that can be filled, cut, sealed, and then dispensed to your desired length for new use.