Vacuflo

A cyclonic system relies on centrifugal force to separate large dirt particles from fine dust. The large debris collects in a bucket at the bottom of the unit, which needs to be emptied 2-3 times a year. Because fine dust particles pass through the exhaust, these units must be vented outside. There is a screen inside the unit which should be cleaned each time you empty the bucket. Cyclonic units are advantageous for those who don't want to worry about replacement bags or filters. It should be noted that because the dust is not contained, emptying and cleaning the screen can get messy. 

A bagless, filtered system is ideal for those who wish to avoid bags, but cannot exhaust outdoors. The bucket empties the same way as the cyclonic unit, however there is a filter inside the unit which will need to be changed every 1-5 years depending on the model. 

A bagged system is the ultimate in hygiene and performance. Because the vacuumed debris is sealed in a HEPA bag, exposure to harmful allergens is minimized upon emptying. In addition, cleaning power is sustained longer than a filtered system because the surface area of the bag is much larger.