FIELD: construction industry, ventilation of roofing, predominantly, in conservatory. SUBSTANCE: ventilation system includes fan enclosure that can be linked to part of apex squared beam of roofing and fan rotor with electric motor drive installed in enclosure. Fan enclosure can be anchored on lower side of squared beam or on lower side of beam crowning roofing. EFFECT: updating of ventilation system. 24 cl, 29 dwg
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|---|---|---|---|
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SU865217A1 |
