They are used for air movement in rectangular ducts of supply and exhaust ventilation systems of residential, public and industrial premises, when there are high requirements to the noise level. The main purpose of duct fans is to pump the pressure level, which is necessary for uniform and stable air exchange within the served room or building.
Depending on the needs of the object of service, duct type fans can be used to organise supply ventilation, responsible for the arrival of fresh air from the street, or exhaust ventilation, which provides removal of exhaust air and harmful impurities contained in it outside the service area.
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