Quality and environmental management Vent System Project OÜ follows the principles of the ISO 9001 certificate.
Air filtration systems for ventilation consist of air filters, cassette filters, filter boxes and sealing elements that clean supply or extract air in ventilation systems. They are installed in air handling units (AHU), rooftop units and ductwork to protect equipment and occupants from dust, pollen, soot and other contaminants.
Standalone air purifiers work locally in a single room and are not connected to the building’s ventilation ducts. Air filtration systems for ventilation are integrated into the central ventilation system and are designed for higher airflows, industrial/commercial conditions and specified filtration classes according to the ventilation design.
Cassette filters and ventilation filter boxes are used in office buildings, shopping centres, warehouses, logistics hubs, industrial plants and other commercial buildings. They are installed in air handling units or ductwork to provide the required level of air filtration for entire zones, floors or buildings.
A cassette filter is a replaceable filter element that provides a specific filtration class. A filter box is a metal housing installed in the ductwork or connected directly to the AHU, into which cassette or panel filters are inserted. Filter boxes are especially useful when an additional filtration stage is needed for a specific branch or when there is not enough space inside the unit itself.
Ventilation filters are divided into coarse, medium and fine filtration classes according to current standards (for example ePM10, ePM2.5, ePM1). For storage areas and technical rooms coarse and medium filters are often sufficient, while offices, retail areas and sensitive industrial processes require higher filter classes. The choice is based on the project requirements, outdoor air quality and the building’s use.
Replacement intervals depend on outdoor air quality, operating hours and filter class, but in most commercial and industrial buildings filters are changed every 3–6 months, sometimes once per year in cleaner environments. In addition to the calendar, pressure drop across the filter and visual inspection should always be monitored.
A clogged filter increases pressure drop in the system, which means the fan must work harder to deliver the same airflow. This leads to higher energy consumption, reduced airflow in the rooms and additional stress on the equipment. Regular filter replacement reduces energy use and keeps the ventilation system within its design parameters.
Filter boxes are used when an extra filtration stage is needed close to a specific zone (for example clean areas, laboratories, offices with higher requirements) or when an existing ventilation system must be upgraded without replacing the air handling unit. They allow you to add or improve filtration on selected branches of the ductwork.
Basic filter replacement can often be carried out by on-site maintenance staff, provided they follow safety rules and the manufacturer’s instructions. For larger industrial and multi-zone systems, we recommend using professional service teams who can check filter classes, pressure drop, sealing and the overall condition of air filtration systems at the same time.
Our main market is Estonia, and we also supply cassette filters, filter boxes and other ventilation filtration components to Latvia and Lithuania. Pricing depends on the filtration class, dimensions, housing type, materials and order volume. For projects we prepare individual quotations, taking into account technical requirements and logistics in the Baltic region.
VENT SYSTEM PROJECT OÜ (11720522), Ida-Viru County, Narva City, Narva, Oru tn 4, 20203
VENT SYSTEM PROJECT OÜ (11720522), Ida-Viru County, Narva City, Narva, Oru tn 4, 20203
