For an optimal performance of your vacuum cleaner not only a good quality dust bag is important. Most vacuum cleaners also use multiple filters to ensure a good quality of exhausted air.
Motor filter: a motor filter is used for the protection of the vacuum cleaner engine. It ensures that coarse particles do not enter the engine. The motor filter has a coarser structure.
Micro filter: the micro filter filters the air that is blown out by the vacuum cleaner. Fine particles are retained by this filter.
Carbon filter: air that is blown out usually also passes the engine of the vacuum cleaner. That is why this air can smell very musty. The carbon filter not only retains fine dust particles, but also neutralizes unpleasant odors. The present odor molecules are bound to the carbon, providing cleaner air to be blown out. A carbon filter is especially recommended for pet owners and smokers.
HEPA filter: the air that blows out of the vacuum cleaner, is purified by the HEPA filter of odor and extremely fine particles, such as pollen, animal dander and dust mite droppings. This filter is therefore very suitable for people with an allergy to dust or people with a respiratory disease. HEPA stands for filtration of a 99.9% of all particles larger than 1 micron (one thousandth of a millimeter). The acronym HEPA means "High Efficiency Particulate Air".
Replace all filters at least after using 5 dust bags or when the indicator of your vacuum cleaner indicates that it is time to replace them.
Washable filters must be cleaned regularly. Only insert them into your vacuum cleaner again if they are well dried.