Filter choice

The airflow of your vacuum cleaner is the most important factor in determining which cyclone filter is suitable for your vacuum cleaner.  The manual of your vacuum cleaner will show the airflow with one of the following indications:

• number of liters air per second;
• number of liters air per minute;
• number of m3 air per hour.

This airflow value must be between the minimum airflow rate and the maximum airflow rate of a filter. Below is an overview of the minimum airflow that each filter requires and the maximum airflow that each can handle:

Model	Cyclone filter model 2	Cyclone filter model 3	Cyclone filter model L	Cyclone filter model XL	Cyclone filter metal
Airflow per sec	Min: 28 liter Max: 67 liter	Min: 28 liter Max: 78 liter	Min: 67 liter Max: 175 liter	Min: 167 liter Max: 333 liter	Min: 28 liter Max: 97 liter
Airflow per min	Min: 1670 liter Max: 4000 liter	Min: 1670 liter Max: 4667 liter	Min: 4000 liter Max: 10500 liter	Min: 10000 liter Max: 20000 liter	Min: 1670 liter Max: 5833 liter
Airflow per hour	Min: 100 m3 Max: 240 m3	Min: 100 m3 Max: 280 m3	Min: 240 m3 Max: 630 m3	Min: 600 m3 Max: 1200 m3	Min: 100 m3 Max: 350 m3

Example: the Bosch AdvanceVac 20 vacuum cleaner can transport 70 liters of air per second. Cyclone filter model 3 is therefore the best choice for this vacuum cleaner.

Cyclone filter model 3 is suitable for 99% of all (construction) vacuum cleaners. Only very powerful, multi-motor vacuum cleaners and central extraction systems need a larger filter, such as our cyclone filter model L and model XL.

Not sure how many liters of air your vacuum cleaner can transport? Then you can also check the inner diameter of the vacuum cleaner hose. If it has an inner diameter between 27mm and 50mm, then the cyclone filter model 3 is suitable in most cases.