FIELD: ventilation and air conditioning.
SUBSTANCE: invention relates to ventilation, mainly ventilation of living rooms, and is intended for filtration of air coming from street into room. A channel sleeve filter for ventilation systems consists of a filtering element and a ring; at that, the filter element is made of at least two sewed pieces of woven material, each of which has at least one section with parallel sides and at least one convergent section.
EFFECT: providing free movement of the filter in the air channel when installed in the channel, reliable fixation in the channel for operation of the filter after installation, as well as adaptation of the filter for various diameters of the air channel.
7 cl, 5 dwg
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