Ordering filters for ventilation systems today is very easy using specialized online stores. Air filters are of different types. Each of these species has its own characteristics and advantages. Mechanical filters are considered the simplest and most common species. However, they serve only for primary air purification. Cassette filters that consist of special mesh material provide perfect clean air in any space. Pocket filters consist of some collector bags that are used in various air conditioning and ventilation systems. Such filters are also actively used to prepare air, which should be cleaned. There are filters that are designed to clean dust. For example, electrostatic filters. Using these filters, cleaning is carried out due to the fact that heteropoly charges stretch from metal. One of the most famous filters of this type is the Trion brand filter. This filter allows you to effectively get rid of not only dust, but also from various bacteria, viruses, tobacco smoke, etc.D.