FIELD: ventilation.
SUBSTANCE: present invention relates to the field of ventilation, mainly ventilation of residential premises, and is intended for filtration of air coming from the street into a room. Volumetric filter from non-woven self-supporting material includes a lower base, an upper base and a filter element placed between the bases. Filtering element is formed from polymer bearing fibres and includes polymer filtering fibres, the diameter of which is at least an order less than the diameter of bearing fibres. Wherein carrier and filter fibres are randomly interlaced while carrier fibres form coherent three-dimensional frame of filter element with cross section converging from top base to bottom base.
EFFECT: described volumetric filter provides longer service life of the filter, including due to possibility of its reuse after clogging, as well as due to increased effective filtration area.
15 cl, 12 dwg
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